Home / 128,115,173,356.32-192,204,768,521.52-90,415,358,199.84

Finding the Fourth Proportional to 128,115,173,356.32, 192,204,768,521.52 and 90,415,358,199.84

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Solution

The fourth proportional to 128,115,173,356.32, 192,204,768,521.52 and 90,415,358,199.84 is: 135,645,626,808.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,115,173,356.32 : 192,204,768,521.52 = 90,415,358,199.84 : x
  2. Step 2: Convert to fraction form
    128,115,173,356.32/192,204,768,521.52 = 90,415,358,199.84/x
  3. Step 3: Cross multiply
    128,115,173,356.32x = 192,204,768,521.52 × 90,415,358,199.84
  4. Step 4: Simplify right side
    128,115,173,356.32x = 17,378,262,993,590,561,013,760
  5. Step 5: Solve for x
    x = 17,378,262,993,590,561,013,760/128,115,173,356.32
  6. Step 6: Final answer
    x = 135,645,626,808.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.