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Finding the Fourth Proportional to 71,447.68, 98,597.40 and 39,621.28

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Solution

The fourth proportional to 71,447.68, 98,597.40 and 39,621.28 is: 54,677.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,447.68 : 98,597.40 = 39,621.28 : x
  2. Step 2: Convert to fraction form
    71,447.68/98,597.40 = 39,621.28/x
  3. Step 3: Cross multiply
    71,447.68x = 98,597.40 × 39,621.28
  4. Step 4: Simplify right side
    71,447.68x = 3,906,555,192.67
  5. Step 5: Solve for x
    x = 3,906,555,192.67/71,447.68
  6. Step 6: Final answer
    x = 54,677.15

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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.