Home / 129,687.48-178,979.76-73,110.60

Finding the Fourth Proportional to 129,687.48, 178,979.76 and 73,110.60

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Solution

The fourth proportional to 129,687.48, 178,979.76 and 73,110.60 is: 100,898.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,687.48 : 178,979.76 = 73,110.60 : x
  2. Step 2: Convert to fraction form
    129,687.48/178,979.76 = 73,110.60/x
  3. Step 3: Cross multiply
    129,687.48x = 178,979.76 × 73,110.60
  4. Step 4: Simplify right side
    129,687.48x = 13,085,317,641.46
  5. Step 5: Solve for x
    x = 13,085,317,641.46/129,687.48
  6. Step 6: Final answer
    x = 100,898.85

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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.