Home / 129,349.53-178,502.40-72,760.95

Finding the Fourth Proportional to 129,349.53, 178,502.40 and 72,760.95

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Solution

The fourth proportional to 129,349.53, 178,502.40 and 72,760.95 is: 100,410.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,349.53 : 178,502.40 = 72,760.95 : x
  2. Step 2: Convert to fraction form
    129,349.53/178,502.40 = 72,760.95/x
  3. Step 3: Cross multiply
    129,349.53x = 178,502.40 × 72,760.95
  4. Step 4: Simplify right side
    129,349.53x = 12,988,004,201.28
  5. Step 5: Solve for x
    x = 12,988,004,201.28/129,349.53
  6. Step 6: Final answer
    x = 100,410.14

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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.