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Finding the Fourth Proportional to 60,162.54, 90,242.72 and 20,718.78

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Solution

The fourth proportional to 60,162.54, 90,242.72 and 20,718.78 is: 31,077.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,162.54 : 90,242.72 = 20,718.78 : x
  2. Step 2: Convert to fraction form
    60,162.54/90,242.72 = 20,718.78/x
  3. Step 3: Cross multiply
    60,162.54x = 90,242.72 × 20,718.78
  4. Step 4: Simplify right side
    60,162.54x = 1,869,719,062.28
  5. Step 5: Solve for x
    x = 1,869,719,062.28/60,162.54
  6. Step 6: Final answer
    x = 31,077.79

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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.