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Finding the Fourth Proportional to 61,246.80, 84,515.40 and 34,387.20

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Solution

The fourth proportional to 61,246.80, 84,515.40 and 34,387.20 is: 47,451.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,246.80 : 84,515.40 = 34,387.20 : x
  2. Step 2: Convert to fraction form
    61,246.80/84,515.40 = 34,387.20/x
  3. Step 3: Cross multiply
    61,246.80x = 84,515.40 × 34,387.20
  4. Step 4: Simplify right side
    61,246.80x = 2,906,247,962.88
  5. Step 5: Solve for x
    x = 2,906,247,962.88/61,246.80
  6. Step 6: Final answer
    x = 47,451.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.