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Finding the Fourth Proportional to 129,385.84, 178,552.52 and 72,797.22

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Solution

The fourth proportional to 129,385.84, 178,552.52 and 72,797.22 is: 100,460.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,385.84 : 178,552.52 = 72,797.22 : x
  2. Step 2: Convert to fraction form
    129,385.84/178,552.52 = 72,797.22/x
  3. Step 3: Cross multiply
    129,385.84x = 178,552.52 × 72,797.22
  4. Step 4: Simplify right side
    129,385.84x = 12,998,127,079.99
  5. Step 5: Solve for x
    x = 12,998,127,079.99/129,385.84
  6. Step 6: Final answer
    x = 100,460.20

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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.