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Finding the Fourth Proportional to 72,541.80, 108,799.92 and 19,938.60

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Solution

The fourth proportional to 72,541.80, 108,799.92 and 19,938.60 is: 29,904.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,541.80 : 108,799.92 = 19,938.60 : x
  2. Step 2: Convert to fraction form
    72,541.80/108,799.92 = 19,938.60/x
  3. Step 3: Cross multiply
    72,541.80x = 108,799.92 × 19,938.60
  4. Step 4: Simplify right side
    72,541.80x = 2,169,318,084.91
  5. Step 5: Solve for x
    x = 2,169,318,084.91/72,541.80
  6. Step 6: Final answer
    x = 29,904.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.