Home / 87,731.30-131,402.55-72,179.30

Finding the Fourth Proportional to 87,731.30, 131,402.55 and 72,179.30

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Solution

The fourth proportional to 87,731.30, 131,402.55 and 72,179.30 is: 108,109.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,731.30 : 131,402.55 = 72,179.30 : x
  2. Step 2: Convert to fraction form
    87,731.30/131,402.55 = 72,179.30/x
  3. Step 3: Cross multiply
    87,731.30x = 131,402.55 × 72,179.30
  4. Step 4: Simplify right side
    87,731.30x = 9,484,544,077.22
  5. Step 5: Solve for x
    x = 9,484,544,077.22/87,731.30
  6. Step 6: Final answer
    x = 108,109.01

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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.