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Finding the Fourth Proportional to 71,372.20, 107,058.30 and 47,871.40

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Solution

The fourth proportional to 71,372.20, 107,058.30 and 47,871.40 is: 71,807.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,372.20 : 107,058.30 = 47,871.40 : x
  2. Step 2: Convert to fraction form
    71,372.20/107,058.30 = 47,871.40/x
  3. Step 3: Cross multiply
    71,372.20x = 107,058.30 × 47,871.40
  4. Step 4: Simplify right side
    71,372.20x = 5,125,030,702.62
  5. Step 5: Solve for x
    x = 5,125,030,702.62/71,372.20
  6. Step 6: Final answer
    x = 71,807.10

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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.