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Finding the Fourth Proportional to 71,481.06, 98,643.15 and 39,649.14

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Solution

The fourth proportional to 71,481.06, 98,643.15 and 39,649.14 is: 54,715.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,481.06 : 98,643.15 = 39,649.14 : x
  2. Step 2: Convert to fraction form
    71,481.06/98,643.15 = 39,649.14/x
  3. Step 3: Cross multiply
    71,481.06x = 98,643.15 × 39,649.14
  4. Step 4: Simplify right side
    71,481.06x = 3,911,116,064.39
  5. Step 5: Solve for x
    x = 3,911,116,064.39/71,481.06
  6. Step 6: Final answer
    x = 54,715.42

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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.