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Finding the Fourth Proportional to 87,649.88, 120,932.34 and 59,009.90

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Solution

The fourth proportional to 87,649.88, 120,932.34 and 59,009.90 is: 81,417.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,649.88 : 120,932.34 = 59,009.90 : x
  2. Step 2: Convert to fraction form
    87,649.88/120,932.34 = 59,009.90/x
  3. Step 3: Cross multiply
    87,649.88x = 120,932.34 × 59,009.90
  4. Step 4: Simplify right side
    87,649.88x = 7,136,205,290.17
  5. Step 5: Solve for x
    x = 7,136,205,290.17/87,649.88
  6. Step 6: Final answer
    x = 81,417.17

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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.