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Finding the Fourth Proportional to 129,073.42, 178,136.58 and 72,484.66

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Solution

The fourth proportional to 129,073.42, 178,136.58 and 72,484.66 is: 100,037.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,073.42 : 178,136.58 = 72,484.66 : x
  2. Step 2: Convert to fraction form
    129,073.42/178,136.58 = 72,484.66/x
  3. Step 3: Cross multiply
    129,073.42x = 178,136.58 × 72,484.66
  4. Step 4: Simplify right side
    129,073.42x = 12,912,169,434.86
  5. Step 5: Solve for x
    x = 12,912,169,434.86/129,073.42
  6. Step 6: Final answer
    x = 100,037.40

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.