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Finding the Fourth Proportional to 87,381.25, 130,789.94 and 45,203.25

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Solution

The fourth proportional to 87,381.25, 130,789.94 and 45,203.25 is: 67,659.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,381.25 : 130,789.94 = 45,203.25 : x
  2. Step 2: Convert to fraction form
    87,381.25/130,789.94 = 45,203.25/x
  3. Step 3: Cross multiply
    87,381.25x = 130,789.94 × 45,203.25
  4. Step 4: Simplify right side
    87,381.25x = 5,912,129,814.36
  5. Step 5: Solve for x
    x = 5,912,129,814.36/87,381.25
  6. Step 6: Final answer
    x = 67,659.02

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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.