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Finding the Fourth Proportional to 71,161.98, 98,203.55 and 39,330.88

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Solution

The fourth proportional to 71,161.98, 98,203.55 and 39,330.88 is: 54,276.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,161.98 : 98,203.55 = 39,330.88 : x
  2. Step 2: Convert to fraction form
    71,161.98/98,203.55 = 39,330.88/x
  3. Step 3: Cross multiply
    71,161.98x = 98,203.55 × 39,330.88
  4. Step 4: Simplify right side
    71,161.98x = 3,862,432,013.10
  5. Step 5: Solve for x
    x = 3,862,432,013.10/71,161.98
  6. Step 6: Final answer
    x = 54,276.62

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1.5x scale

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.