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Finding the Fourth Proportional to 87,718.80, 131,491.80 and 43,352.40

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Solution

The fourth proportional to 87,718.80, 131,491.80 and 43,352.40 is: 64,985.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,718.80 : 131,491.80 = 43,352.40 : x
  2. Step 2: Convert to fraction form
    87,718.80/131,491.80 = 43,352.40/x
  3. Step 3: Cross multiply
    87,718.80x = 131,491.80 × 43,352.40
  4. Step 4: Simplify right side
    87,718.80x = 5,700,485,110.32
  5. Step 5: Solve for x
    x = 5,700,485,110.32/87,718.80
  6. Step 6: Final answer
    x = 64,985.90

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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.