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Finding the Fourth Proportional to 71,291.78, 98,381.42 and 39,459.98

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Solution

The fourth proportional to 71,291.78, 98,381.42 and 39,459.98 is: 54,454.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,291.78 : 98,381.42 = 39,459.98 : x
  2. Step 2: Convert to fraction form
    71,291.78/98,381.42 = 39,459.98/x
  3. Step 3: Cross multiply
    71,291.78x = 98,381.42 × 39,459.98
  4. Step 4: Simplify right side
    71,291.78x = 3,882,128,865.57
  5. Step 5: Solve for x
    x = 3,882,128,865.57/71,291.78
  6. Step 6: Final answer
    x = 54,454.09

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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.