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Finding the Fourth Proportional to 71,672.49, 98,901.96 and 39,405.38

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Solution

The fourth proportional to 71,672.49, 98,901.96 and 39,405.38 is: 54,376.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,672.49 : 98,901.96 = 39,405.38 : x
  2. Step 2: Convert to fraction form
    71,672.49/98,901.96 = 39,405.38/x
  3. Step 3: Cross multiply
    71,672.49x = 98,901.96 × 39,405.38
  4. Step 4: Simplify right side
    71,672.49x = 3,897,268,822.04
  5. Step 5: Solve for x
    x = 3,897,268,822.04/71,672.49
  6. Step 6: Final answer
    x = 54,376.08

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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.