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Finding the Fourth Proportional to 80,572.40, 120,743.40 and 59,346.80

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Solution

The fourth proportional to 80,572.40, 120,743.40 and 59,346.80 is: 88,935.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,572.40 : 120,743.40 = 59,346.80 : x
  2. Step 2: Convert to fraction form
    80,572.40/120,743.40 = 59,346.80/x
  3. Step 3: Cross multiply
    80,572.40x = 120,743.40 × 59,346.80
  4. Step 4: Simplify right side
    80,572.40x = 7,165,734,411.12
  5. Step 5: Solve for x
    x = 7,165,734,411.12/80,572.40
  6. Step 6: Final answer
    x = 88,935.35

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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.