Home / 129,374.01-178,534.13-72,785.52

Finding the Fourth Proportional to 129,374.01, 178,534.13 and 72,785.52

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Solution

The fourth proportional to 129,374.01, 178,534.13 and 72,785.52 is: 100,442.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,374.01 : 178,534.13 = 72,785.52 : x
  2. Step 2: Convert to fraction form
    129,374.01/178,534.13 = 72,785.52/x
  3. Step 3: Cross multiply
    129,374.01x = 178,534.13 × 72,785.52
  4. Step 4: Simplify right side
    129,374.01x = 12,994,699,125.87
  5. Step 5: Solve for x
    x = 12,994,699,125.87/129,374.01
  6. Step 6: Final answer
    x = 100,442.89

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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.