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Finding the Fourth Proportional to 87,200.70, 130,541.85 and 57,651.90

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Solution

The fourth proportional to 87,200.70, 130,541.85 and 57,651.90 is: 86,306.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,200.70 : 130,541.85 = 57,651.90 : x
  2. Step 2: Convert to fraction form
    87,200.70/130,541.85 = 57,651.90/x
  3. Step 3: Cross multiply
    87,200.70x = 130,541.85 × 57,651.90
  4. Step 4: Simplify right side
    87,200.70x = 7,525,985,682.02
  5. Step 5: Solve for x
    x = 7,525,985,682.02/87,200.70
  6. Step 6: Final answer
    x = 86,306.48

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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.