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Finding the Fourth Proportional to 71,392.42, 98,522.13 and 39,561.85

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Solution

The fourth proportional to 71,392.42, 98,522.13 and 39,561.85 is: 54,595.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,392.42 : 98,522.13 = 39,561.85 : x
  2. Step 2: Convert to fraction form
    71,392.42/98,522.13 = 39,561.85/x
  3. Step 3: Cross multiply
    71,392.42x = 98,522.13 × 39,561.85
  4. Step 4: Simplify right side
    71,392.42x = 3,897,717,975.05
  5. Step 5: Solve for x
    x = 3,897,717,975.05/71,392.42
  6. Step 6: Final answer
    x = 54,595.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.