Home / 128,685.52-177,593.28-72,115.12

Finding the Fourth Proportional to 128,685.52, 177,593.28 and 72,115.12

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Solution

The fourth proportional to 128,685.52, 177,593.28 and 72,115.12 is: 99,522.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,685.52 : 177,593.28 = 72,115.12 : x
  2. Step 2: Convert to fraction form
    128,685.52/177,593.28 = 72,115.12/x
  3. Step 3: Cross multiply
    128,685.52x = 177,593.28 × 72,115.12
  4. Step 4: Simplify right side
    128,685.52x = 12,807,160,698.39
  5. Step 5: Solve for x
    x = 12,807,160,698.39/128,685.52
  6. Step 6: Final answer
    x = 99,522.94

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1.5x scale

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.