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Finding the Fourth Proportional to 79,488.04, 109,691.22 and 45,029.56

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Solution

The fourth proportional to 79,488.04, 109,691.22 and 45,029.56 is: 62,139.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,488.04 : 109,691.22 = 45,029.56 : x
  2. Step 2: Convert to fraction form
    79,488.04/109,691.22 = 45,029.56/x
  3. Step 3: Cross multiply
    79,488.04x = 109,691.22 × 45,029.56
  4. Step 4: Simplify right side
    79,488.04x = 4,939,347,372.46
  5. Step 5: Solve for x
    x = 4,939,347,372.46/79,488.04
  6. Step 6: Final answer
    x = 62,139.50

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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.