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Finding the Fourth Proportional to 129,625.92, 178,893.12 and 72,269.12

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Solution

The fourth proportional to 129,625.92, 178,893.12 and 72,269.12 is: 99,736.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,625.92 : 178,893.12 = 72,269.12 : x
  2. Step 2: Convert to fraction form
    129,625.92/178,893.12 = 72,269.12/x
  3. Step 3: Cross multiply
    129,625.92x = 178,893.12 × 72,269.12
  4. Step 4: Simplify right side
    129,625.92x = 12,928,448,356.45
  5. Step 5: Solve for x
    x = 12,928,448,356.45/129,625.92
  6. Step 6: Final answer
    x = 99,736.60

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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.