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Finding the Fourth Proportional to 87,700.80, 131,486.40 and 48,302.40

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Solution

The fourth proportional to 87,700.80, 131,486.40 and 48,302.40 is: 72,417.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,700.80 : 131,486.40 = 48,302.40 : x
  2. Step 2: Convert to fraction form
    87,700.80/131,486.40 = 48,302.40/x
  3. Step 3: Cross multiply
    87,700.80x = 131,486.40 × 48,302.40
  4. Step 4: Simplify right side
    87,700.80x = 6,351,108,687.36
  5. Step 5: Solve for x
    x = 6,351,108,687.36/87,700.80
  6. Step 6: Final answer
    x = 72,417.91

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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.