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Finding the Fourth Proportional to 59,720.80, 89,581.20 and 51,410.20

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Solution

The fourth proportional to 59,720.80, 89,581.20 and 51,410.20 is: 77,115.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,720.80 : 89,581.20 = 51,410.20 : x
  2. Step 2: Convert to fraction form
    59,720.80/89,581.20 = 51,410.20/x
  3. Step 3: Cross multiply
    59,720.80x = 89,581.20 × 51,410.20
  4. Step 4: Simplify right side
    59,720.80x = 4,605,387,408.24
  5. Step 5: Solve for x
    x = 4,605,387,408.24/59,720.80
  6. Step 6: Final answer
    x = 77,115.30

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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.