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Finding the Fourth Proportional to 65,841.89, 90,863.13 and 38,974.59

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Solution

The fourth proportional to 65,841.89, 90,863.13 and 38,974.59 is: 53,785.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,841.89 : 90,863.13 = 38,974.59 : x
  2. Step 2: Convert to fraction form
    65,841.89/90,863.13 = 38,974.59/x
  3. Step 3: Cross multiply
    65,841.89x = 90,863.13 × 38,974.59
  4. Step 4: Simplify right side
    65,841.89x = 3,541,353,237.87
  5. Step 5: Solve for x
    x = 3,541,353,237.87/65,841.89
  6. Step 6: Final answer
    x = 53,785.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.