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Finding the Fourth Proportional to 103,039.20, 154,472.40 and 53,791.20

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Solution

The fourth proportional to 103,039.20, 154,472.40 and 53,791.20 is: 80,641.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,039.20 : 154,472.40 = 53,791.20 : x
  2. Step 2: Convert to fraction form
    103,039.20/154,472.40 = 53,791.20/x
  3. Step 3: Cross multiply
    103,039.20x = 154,472.40 × 53,791.20
  4. Step 4: Simplify right side
    103,039.20x = 8,309,255,762.88
  5. Step 5: Solve for x
    x = 8,309,255,762.88/103,039.20
  6. Step 6: Final answer
    x = 80,641.70

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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.