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Finding the Fourth Proportional to 71,148.03, 98,174.31 and 40,921.86

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Solution

The fourth proportional to 71,148.03, 98,174.31 and 40,921.86 is: 56,466.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,148.03 : 98,174.31 = 40,921.86 : x
  2. Step 2: Convert to fraction form
    71,148.03/98,174.31 = 40,921.86/x
  3. Step 3: Cross multiply
    71,148.03x = 98,174.31 × 40,921.86
  4. Step 4: Simplify right side
    71,148.03x = 4,017,475,369.42
  5. Step 5: Solve for x
    x = 4,017,475,369.42/71,148.03
  6. Step 6: Final answer
    x = 56,466.43

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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.