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Finding the Fourth Proportional to 79,791.40, 119,687.10 and 48,687.40

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Solution

The fourth proportional to 79,791.40, 119,687.10 and 48,687.40 is: 73,031.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,791.40 : 119,687.10 = 48,687.40 : x
  2. Step 2: Convert to fraction form
    79,791.40/119,687.10 = 48,687.40/x
  3. Step 3: Cross multiply
    79,791.40x = 119,687.10 × 48,687.40
  4. Step 4: Simplify right side
    79,791.40x = 5,827,253,712.54
  5. Step 5: Solve for x
    x = 5,827,253,712.54/79,791.40
  6. Step 6: Final answer
    x = 73,031.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.