Home / 129,324.27-178,472.54-78,308.17

Finding the Fourth Proportional to 129,324.27, 178,472.54 and 78,308.17

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Solution

The fourth proportional to 129,324.27, 178,472.54 and 78,308.17 is: 108,068.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,324.27 : 178,472.54 = 78,308.17 : x
  2. Step 2: Convert to fraction form
    129,324.27/178,472.54 = 78,308.17/x
  3. Step 3: Cross multiply
    129,324.27x = 178,472.54 × 78,308.17
  4. Step 4: Simplify right side
    129,324.27x = 13,975,858,002.65
  5. Step 5: Solve for x
    x = 13,975,858,002.65/129,324.27
  6. Step 6: Final answer
    x = 108,068.33

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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.