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Finding the Fourth Proportional to 71,726.56, 107,466.78 and 40,129.84

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Solution

The fourth proportional to 71,726.56, 107,466.78 and 40,129.84 is: 60,125.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,726.56 : 107,466.78 = 40,129.84 : x
  2. Step 2: Convert to fraction form
    71,726.56/107,466.78 = 40,129.84/x
  3. Step 3: Cross multiply
    71,726.56x = 107,466.78 × 40,129.84
  4. Step 4: Simplify right side
    71,726.56x = 4,312,624,686.72
  5. Step 5: Solve for x
    x = 4,312,624,686.72/71,726.56
  6. Step 6: Final answer
    x = 60,125.91

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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.