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Finding the Fourth Proportional to 93,761.80, 140,812.12 and 86,251.53

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Solution

The fourth proportional to 93,761.80, 140,812.12 and 86,251.53 is: 129,533.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,761.80 : 140,812.12 = 86,251.53 : x
  2. Step 2: Convert to fraction form
    93,761.80/140,812.12 = 86,251.53/x
  3. Step 3: Cross multiply
    93,761.80x = 140,812.12 × 86,251.53
  4. Step 4: Simplify right side
    93,761.80x = 12,145,261,428.40
  5. Step 5: Solve for x
    x = 12,145,261,428.40/93,761.80
  6. Step 6: Final answer
    x = 129,533.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.