Home / 128,145.39-176,839.94-70,788.66

Finding the Fourth Proportional to 128,145.39, 176,839.94 and 70,788.66

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Solution

The fourth proportional to 128,145.39, 176,839.94 and 70,788.66 is: 97,687.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,145.39 : 176,839.94 = 70,788.66 : x
  2. Step 2: Convert to fraction form
    128,145.39/176,839.94 = 70,788.66/x
  3. Step 3: Cross multiply
    128,145.39x = 176,839.94 × 70,788.66
  4. Step 4: Simplify right side
    128,145.39x = 12,518,262,033.14
  5. Step 5: Solve for x
    x = 12,518,262,033.14/128,145.39
  6. Step 6: Final answer
    x = 97,687.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.