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Finding the Fourth Proportional to 71,719.20, 107,360.10 and 42,048.90

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Solution

The fourth proportional to 71,719.20, 107,360.10 and 42,048.90 is: 62,945.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,719.20 : 107,360.10 = 42,048.90 : x
  2. Step 2: Convert to fraction form
    71,719.20/107,360.10 = 42,048.90/x
  3. Step 3: Cross multiply
    71,719.20x = 107,360.10 × 42,048.90
  4. Step 4: Simplify right side
    71,719.20x = 4,514,374,108.89
  5. Step 5: Solve for x
    x = 4,514,374,108.89/71,719.20
  6. Step 6: Final answer
    x = 62,945.13

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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.