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Finding the Fourth Proportional to 87,374.31, 120,617.14 and 65,872.76

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Solution

The fourth proportional to 87,374.31, 120,617.14 and 65,872.76 is: 90,935.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,374.31 : 120,617.14 = 65,872.76 : x
  2. Step 2: Convert to fraction form
    87,374.31/120,617.14 = 65,872.76/x
  3. Step 3: Cross multiply
    87,374.31x = 120,617.14 × 65,872.76
  4. Step 4: Simplify right side
    87,374.31x = 7,945,383,778.25
  5. Step 5: Solve for x
    x = 7,945,383,778.25/87,374.31
  6. Step 6: Final answer
    x = 90,935.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.