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Finding the Fourth Proportional to 71,149.49, 98,190.08 and 40,939.40

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Solution

The fourth proportional to 71,149.49, 98,190.08 and 40,939.40 is: 56,498.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,149.49 : 98,190.08 = 40,939.40 : x
  2. Step 2: Convert to fraction form
    71,149.49/98,190.08 = 40,939.40/x
  3. Step 3: Cross multiply
    71,149.49x = 98,190.08 × 40,939.40
  4. Step 4: Simplify right side
    71,149.49x = 4,019,842,961.15
  5. Step 5: Solve for x
    x = 4,019,842,961.15/71,149.49
  6. Step 6: Final answer
    x = 56,498.55

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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.