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Finding the Fourth Proportional to 87,513.68, 120,851.68 and 69,739.44

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Solution

The fourth proportional to 87,513.68, 120,851.68 and 69,739.44 is: 96,306.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,513.68 : 120,851.68 = 69,739.44 : x
  2. Step 2: Convert to fraction form
    87,513.68/120,851.68 = 69,739.44/x
  3. Step 3: Cross multiply
    87,513.68x = 120,851.68 × 69,739.44
  4. Step 4: Simplify right side
    87,513.68x = 8,428,128,486.26
  5. Step 5: Solve for x
    x = 8,428,128,486.26/87,513.68
  6. Step 6: Final answer
    x = 96,306.41

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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.