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Finding the Fourth Proportional to 90,091.92, 134,934.84 and 43,379.76

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Solution

The fourth proportional to 90,091.92, 134,934.84 and 43,379.76 is: 64,971.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,091.92 : 134,934.84 = 43,379.76 : x
  2. Step 2: Convert to fraction form
    90,091.92/134,934.84 = 43,379.76/x
  3. Step 3: Cross multiply
    90,091.92x = 134,934.84 × 43,379.76
  4. Step 4: Simplify right side
    90,091.92x = 5,853,440,974.84
  5. Step 5: Solve for x
    x = 5,853,440,974.84/90,091.92
  6. Step 6: Final answer
    x = 64,971.88

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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.