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Finding the Fourth Proportional to 40,901, 61,365.90 and 20,139.08

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Solution

The fourth proportional to 40,901, 61,365.90 and 20,139.08 is: 30,215.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,901 : 61,365.90 = 20,139.08 : x
  2. Step 2: Convert to fraction form
    40,901/61,365.90 = 20,139.08/x
  3. Step 3: Cross multiply
    40,901x = 61,365.90 × 20,139.08
  4. Step 4: Simplify right side
    40,901x = 1,235,852,769.37
  5. Step 5: Solve for x
    x = 1,235,852,769.37/40,901
  6. Step 6: Final answer
    x = 30,215.71

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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.