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Finding the Fourth Proportional to 65,772.92, 90,767.51 and 38,914.74

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Solution

The fourth proportional to 65,772.92, 90,767.51 and 38,914.74 is: 53,702.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,772.92 : 90,767.51 = 38,914.74 : x
  2. Step 2: Convert to fraction form
    65,772.92/90,767.51 = 38,914.74/x
  3. Step 3: Cross multiply
    65,772.92x = 90,767.51 × 38,914.74
  4. Step 4: Simplify right side
    65,772.92x = 3,532,193,857.52
  5. Step 5: Solve for x
    x = 3,532,193,857.52/65,772.92
  6. Step 6: Final answer
    x = 53,702.86

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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.