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Finding the Fourth Proportional to 87,998.61, 121,538.31 and 59,655.09

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Solution

The fourth proportional to 87,998.61, 121,538.31 and 59,655.09 is: 82,391.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,998.61 : 121,538.31 = 59,655.09 : x
  2. Step 2: Convert to fraction form
    87,998.61/121,538.31 = 59,655.09/x
  3. Step 3: Cross multiply
    87,998.61x = 121,538.31 × 59,655.09
  4. Step 4: Simplify right side
    87,998.61x = 7,250,378,821.50
  5. Step 5: Solve for x
    x = 7,250,378,821.50/87,998.61
  6. Step 6: Final answer
    x = 82,391.97

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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.