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Finding the Fourth Proportional to 87,118.58, 130,850.67 and 74,633.78

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Solution

The fourth proportional to 87,118.58, 130,850.67 and 74,633.78 is: 112,098.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,118.58 : 130,850.67 = 74,633.78 : x
  2. Step 2: Convert to fraction form
    87,118.58/130,850.67 = 74,633.78/x
  3. Step 3: Cross multiply
    87,118.58x = 130,850.67 × 74,633.78
  4. Step 4: Simplify right side
    87,118.58x = 9,765,880,117.63
  5. Step 5: Solve for x
    x = 9,765,880,117.63/87,118.58
  6. Step 6: Final answer
    x = 112,098.71

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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.