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Finding the Fourth Proportional to 87,405.70, 131,207.10 and 57,881.20

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Solution

The fourth proportional to 87,405.70, 131,207.10 and 57,881.20 is: 86,887.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,405.70 : 131,207.10 = 57,881.20 : x
  2. Step 2: Convert to fraction form
    87,405.70/131,207.10 = 57,881.20/x
  3. Step 3: Cross multiply
    87,405.70x = 131,207.10 × 57,881.20
  4. Step 4: Simplify right side
    87,405.70x = 7,594,424,396.52
  5. Step 5: Solve for x
    x = 7,594,424,396.52/87,405.70
  6. Step 6: Final answer
    x = 86,887.06

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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.