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Finding the Fourth Proportional to 59,687.80, 89,531.70 and 18,129.40

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Solution

The fourth proportional to 59,687.80, 89,531.70 and 18,129.40 is: 27,194.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,687.80 : 89,531.70 = 18,129.40 : x
  2. Step 2: Convert to fraction form
    59,687.80/89,531.70 = 18,129.40/x
  3. Step 3: Cross multiply
    59,687.80x = 89,531.70 × 18,129.40
  4. Step 4: Simplify right side
    59,687.80x = 1,623,156,001.98
  5. Step 5: Solve for x
    x = 1,623,156,001.98/59,687.80
  6. Step 6: Final answer
    x = 27,194.10

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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.