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Finding the Fourth Proportional to 71,930.53, 99,264.13 and 40,101.48

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Solution

The fourth proportional to 71,930.53, 99,264.13 and 40,101.48 is: 55,340.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,930.53 : 99,264.13 = 40,101.48 : x
  2. Step 2: Convert to fraction form
    71,930.53/99,264.13 = 40,101.48/x
  3. Step 3: Cross multiply
    71,930.53x = 99,264.13 × 40,101.48
  4. Step 4: Simplify right side
    71,930.53x = 3,980,638,649.23
  5. Step 5: Solve for x
    x = 3,980,638,649.23/71,930.53
  6. Step 6: Final answer
    x = 55,340.04

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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.