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Finding the Fourth Proportional to 59,797.20, 89,890.20 and 42,387.60

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Solution

The fourth proportional to 59,797.20, 89,890.20 and 42,387.60 is: 63,719.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,797.20 : 89,890.20 = 42,387.60 : x
  2. Step 2: Convert to fraction form
    59,797.20/89,890.20 = 42,387.60/x
  3. Step 3: Cross multiply
    59,797.20x = 89,890.20 × 42,387.60
  4. Step 4: Simplify right side
    59,797.20x = 3,810,229,841.52
  5. Step 5: Solve for x
    x = 3,810,229,841.52/59,797.20
  6. Step 6: Final answer
    x = 63,719.20

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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.