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Finding the Fourth Proportional to 79,281.90, 109,414.08 and 52,377.21

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Solution

The fourth proportional to 79,281.90, 109,414.08 and 52,377.21 is: 72,283.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,281.90 : 109,414.08 = 52,377.21 : x
  2. Step 2: Convert to fraction form
    79,281.90/109,414.08 = 52,377.21/x
  3. Step 3: Cross multiply
    79,281.90x = 109,414.08 × 52,377.21
  4. Step 4: Simplify right side
    79,281.90x = 5,730,804,245.12
  5. Step 5: Solve for x
    x = 5,730,804,245.12/79,281.90
  6. Step 6: Final answer
    x = 72,283.89

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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.