Home / 48,139.40-72,170.70-20,414.60

Finding the Fourth Proportional to 48,139.40, 72,170.70 and 20,414.60

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Solution

The fourth proportional to 48,139.40, 72,170.70 and 20,414.60 is: 30,605.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,139.40 : 72,170.70 = 20,414.60 : x
  2. Step 2: Convert to fraction form
    48,139.40/72,170.70 = 20,414.60/x
  3. Step 3: Cross multiply
    48,139.40x = 72,170.70 × 20,414.60
  4. Step 4: Simplify right side
    48,139.40x = 1,473,335,972.22
  5. Step 5: Solve for x
    x = 1,473,335,972.22/48,139.40
  6. Step 6: Final answer
    x = 30,605.62

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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.