Home / 86,139.82-129,078.15-36,192.61

Finding the Fourth Proportional to 86,139.82, 129,078.15 and 36,192.61

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Solution

The fourth proportional to 86,139.82, 129,078.15 and 36,192.61 is: 54,233.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,139.82 : 129,078.15 = 36,192.61 : x
  2. Step 2: Convert to fraction form
    86,139.82/129,078.15 = 36,192.61/x
  3. Step 3: Cross multiply
    86,139.82x = 129,078.15 × 36,192.61
  4. Step 4: Simplify right side
    86,139.82x = 4,671,675,142.47
  5. Step 5: Solve for x
    x = 4,671,675,142.47/86,139.82
  6. Step 6: Final answer
    x = 54,233.63

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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.