Home / 129,153.60-178,229.68-78,852.56

Finding the Fourth Proportional to 129,153.60, 178,229.68 and 78,852.56

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Solution

The fourth proportional to 129,153.60, 178,229.68 and 78,852.56 is: 108,815.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,153.60 : 178,229.68 = 78,852.56 : x
  2. Step 2: Convert to fraction form
    129,153.60/178,229.68 = 78,852.56/x
  3. Step 3: Cross multiply
    129,153.60x = 178,229.68 × 78,852.56
  4. Step 4: Simplify right side
    129,153.60x = 14,053,866,535.98
  5. Step 5: Solve for x
    x = 14,053,866,535.98/129,153.60
  6. Step 6: Final answer
    x = 108,815.14

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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.