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Finding the Fourth Proportional to 86,452.98, 129,679.47 and 66,760.26

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Solution

The fourth proportional to 86,452.98, 129,679.47 and 66,760.26 is: 100,140.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,452.98 : 129,679.47 = 66,760.26 : x
  2. Step 2: Convert to fraction form
    86,452.98/129,679.47 = 66,760.26/x
  3. Step 3: Cross multiply
    86,452.98x = 129,679.47 × 66,760.26
  4. Step 4: Simplify right side
    86,452.98x = 8,657,435,133.86
  5. Step 5: Solve for x
    x = 8,657,435,133.86/86,452.98
  6. Step 6: Final answer
    x = 100,140.39

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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.