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Finding the Fourth Proportional to 48,145.44, 72,218.16 and 20,425.44

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Solution

The fourth proportional to 48,145.44, 72,218.16 and 20,425.44 is: 30,638.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,145.44 : 72,218.16 = 20,425.44 : x
  2. Step 2: Convert to fraction form
    48,145.44/72,218.16 = 20,425.44/x
  3. Step 3: Cross multiply
    48,145.44x = 72,218.16 × 20,425.44
  4. Step 4: Simplify right side
    48,145.44x = 1,475,087,693.99
  5. Step 5: Solve for x
    x = 1,475,087,693.99/48,145.44
  6. Step 6: Final answer
    x = 30,638.16

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Similar ratio
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1.5x scale

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.