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Finding the Fourth Proportional to 87,672.60, 131,703.30 and 84,130.20

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Solution

The fourth proportional to 87,672.60, 131,703.30 and 84,130.20 is: 126,381.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,672.60 : 131,703.30 = 84,130.20 : x
  2. Step 2: Convert to fraction form
    87,672.60/131,703.30 = 84,130.20/x
  3. Step 3: Cross multiply
    87,672.60x = 131,703.30 × 84,130.20
  4. Step 4: Simplify right side
    87,672.60x = 11,080,224,969.66
  5. Step 5: Solve for x
    x = 11,080,224,969.66/87,672.60
  6. Step 6: Final answer
    x = 126,381.85

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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.