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Finding the Fourth Proportional to 86,453.98, 129,680.98 and 66,761.26

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Solution

The fourth proportional to 86,453.98, 129,680.98 and 66,761.26 is: 100,141.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,453.98 : 129,680.98 = 66,761.26 : x
  2. Step 2: Convert to fraction form
    86,453.98/129,680.98 = 66,761.26/x
  3. Step 3: Cross multiply
    86,453.98x = 129,680.98 × 66,761.26
  4. Step 4: Simplify right side
    86,453.98x = 8,657,665,622.83
  5. Step 5: Solve for x
    x = 8,657,665,622.83/86,453.98
  6. Step 6: Final answer
    x = 100,141.90

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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.