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Finding the Fourth Proportional to 79,013.70, 109,049.15 and 45,034.40

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Solution

The fourth proportional to 79,013.70, 109,049.15 and 45,034.40 is: 62,153.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,013.70 : 109,049.15 = 45,034.40 : x
  2. Step 2: Convert to fraction form
    79,013.70/109,049.15 = 45,034.40/x
  3. Step 3: Cross multiply
    79,013.70x = 109,049.15 × 45,034.40
  4. Step 4: Simplify right side
    79,013.70x = 4,910,963,425.97
  5. Step 5: Solve for x
    x = 4,910,963,425.97/79,013.70
  6. Step 6: Final answer
    x = 62,153.32

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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.