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Finding the Fourth Proportional to 129,372.58, 178,524.30 and 72,773.02

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Solution

The fourth proportional to 129,372.58, 178,524.30 and 72,773.02 is: 100,421.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,372.58 : 178,524.30 = 72,773.02 : x
  2. Step 2: Convert to fraction form
    129,372.58/178,524.30 = 72,773.02/x
  3. Step 3: Cross multiply
    129,372.58x = 178,524.30 × 72,773.02
  4. Step 4: Simplify right side
    129,372.58x = 12,991,752,454.39
  5. Step 5: Solve for x
    x = 12,991,752,454.39/129,372.58
  6. Step 6: Final answer
    x = 100,421.22

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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.