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Finding the Fourth Proportional to 40,897, 61,359.90 and 20,135.08

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Solution

The fourth proportional to 40,897, 61,359.90 and 20,135.08 is: 30,209.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,897 : 61,359.90 = 20,135.08 : x
  2. Step 2: Convert to fraction form
    40,897/61,359.90 = 20,135.08/x
  3. Step 3: Cross multiply
    40,897x = 61,359.90 × 20,135.08
  4. Step 4: Simplify right side
    40,897x = 1,235,486,495.29
  5. Step 5: Solve for x
    x = 1,235,486,495.29/40,897
  6. Step 6: Final answer
    x = 30,209.71

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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.