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Finding the Fourth Proportional to 79,261.90, 109,402.10 and 49,029.66

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Solution

The fourth proportional to 79,261.90, 109,402.10 and 49,029.66 is: 67,673.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,261.90 : 109,402.10 = 49,029.66 : x
  2. Step 2: Convert to fraction form
    79,261.90/109,402.10 = 49,029.66/x
  3. Step 3: Cross multiply
    79,261.90x = 109,402.10 × 49,029.66
  4. Step 4: Simplify right side
    79,261.90x = 5,363,947,766.29
  5. Step 5: Solve for x
    x = 5,363,947,766.29/79,261.90
  6. Step 6: Final answer
    x = 67,673.72

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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.