Home / 128,115,173,354.32-192,204,768,518.52-90,415,358,197.84

Finding the Fourth Proportional to 128,115,173,354.32, 192,204,768,518.52 and 90,415,358,197.84

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Solution

The fourth proportional to 128,115,173,354.32, 192,204,768,518.52 and 90,415,358,197.84 is: 135,645,626,805.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,115,173,354.32 : 192,204,768,518.52 = 90,415,358,197.84 : x
  2. Step 2: Convert to fraction form
    128,115,173,354.32/192,204,768,518.52 = 90,415,358,197.84/x
  3. Step 3: Cross multiply
    128,115,173,354.32x = 192,204,768,518.52 × 90,415,358,197.84
  4. Step 4: Simplify right side
    128,115,173,354.32x = 17,378,262,992,934,905,315,328
  5. Step 5: Solve for x
    x = 17,378,262,992,934,905,315,328/128,115,173,354.32
  6. Step 6: Final answer
    x = 135,645,626,805.44

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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.