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Finding the Fourth Proportional to 71,699.61, 107,563.78 and 40,154.54

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Solution

The fourth proportional to 71,699.61, 107,563.78 and 40,154.54 is: 60,239.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,699.61 : 107,563.78 = 40,154.54 : x
  2. Step 2: Convert to fraction form
    71,699.61/107,563.78 = 40,154.54/x
  3. Step 3: Cross multiply
    71,699.61x = 107,563.78 × 40,154.54
  4. Step 4: Simplify right side
    71,699.61x = 4,319,174,106.56
  5. Step 5: Solve for x
    x = 4,319,174,106.56/71,699.61
  6. Step 6: Final answer
    x = 60,239.85

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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.