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Finding the Fourth Proportional to 85,993.60, 128,951.52 and 30,591.04

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Solution

The fourth proportional to 85,993.60, 128,951.52 and 30,591.04 is: 45,872.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,993.60 : 128,951.52 = 30,591.04 : x
  2. Step 2: Convert to fraction form
    85,993.60/128,951.52 = 30,591.04/x
  3. Step 3: Cross multiply
    85,993.60x = 128,951.52 × 30,591.04
  4. Step 4: Simplify right side
    85,993.60x = 3,944,761,106.38
  5. Step 5: Solve for x
    x = 3,944,761,106.38/85,993.60
  6. Step 6: Final answer
    x = 45,872.73

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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.