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Finding the Fourth Proportional to 86,451.98, 129,677.97 and 66,759.26

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Solution

The fourth proportional to 86,451.98, 129,677.97 and 66,759.26 is: 100,138.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,451.98 : 129,677.97 = 66,759.26 : x
  2. Step 2: Convert to fraction form
    86,451.98/129,677.97 = 66,759.26/x
  3. Step 3: Cross multiply
    86,451.98x = 129,677.97 × 66,759.26
  4. Step 4: Simplify right side
    86,451.98x = 8,657,205,315.50
  5. Step 5: Solve for x
    x = 8,657,205,315.50/86,451.98
  6. Step 6: Final answer
    x = 100,138.89

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Similar ratio
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1.5x scale

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.