Home / 86,630.85-129,951.14-81,918.27

Finding the Fourth Proportional to 86,630.85, 129,951.14 and 81,918.27

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Solution

The fourth proportional to 86,630.85, 129,951.14 and 81,918.27 is: 122,882.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,630.85 : 129,951.14 = 81,918.27 : x
  2. Step 2: Convert to fraction form
    86,630.85/129,951.14 = 81,918.27/x
  3. Step 3: Cross multiply
    86,630.85x = 129,951.14 × 81,918.27
  4. Step 4: Simplify right side
    86,630.85x = 10,645,372,163.74
  5. Step 5: Solve for x
    x = 10,645,372,163.74/86,630.85
  6. Step 6: Final answer
    x = 122,882.00

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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.