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Finding the Fourth Proportional to 87,374.81, 120,617.84 and 65,873.26

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Solution

The fourth proportional to 87,374.81, 120,617.84 and 65,873.26 is: 90,935.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,374.81 : 120,617.84 = 65,873.26 : x
  2. Step 2: Convert to fraction form
    87,374.81/120,617.84 = 65,873.26/x
  3. Step 3: Cross multiply
    87,374.81x = 120,617.84 × 65,873.26
  4. Step 4: Simplify right side
    87,374.81x = 7,945,490,005.59
  5. Step 5: Solve for x
    x = 7,945,490,005.59/87,374.81
  6. Step 6: Final answer
    x = 90,935.71

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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.