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Finding the Fourth Proportional to 65,422.80, 98,134.20 and 60,611.40

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Solution

The fourth proportional to 65,422.80, 98,134.20 and 60,611.40 is: 90,917.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,422.80 : 98,134.20 = 60,611.40 : x
  2. Step 2: Convert to fraction form
    65,422.80/98,134.20 = 60,611.40/x
  3. Step 3: Cross multiply
    65,422.80x = 98,134.20 × 60,611.40
  4. Step 4: Simplify right side
    65,422.80x = 5,948,051,249.88
  5. Step 5: Solve for x
    x = 5,948,051,249.88/65,422.80
  6. Step 6: Final answer
    x = 90,917.10

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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.