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Finding the Fourth Proportional to 48,115.20, 72,194.40 and 21,806.40

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Solution

The fourth proportional to 48,115.20, 72,194.40 and 21,806.40 is: 32,719.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,115.20 : 72,194.40 = 21,806.40 : x
  2. Step 2: Convert to fraction form
    48,115.20/72,194.40 = 21,806.40/x
  3. Step 3: Cross multiply
    48,115.20x = 72,194.40 × 21,806.40
  4. Step 4: Simplify right side
    48,115.20x = 1,574,299,964.16
  5. Step 5: Solve for x
    x = 1,574,299,964.16/48,115.20
  6. Step 6: Final answer
    x = 32,719.39

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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.