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Finding the Fourth Proportional to 65,797.38, 90,718.10 and 54,911.19

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Solution

The fourth proportional to 65,797.38, 90,718.10 and 54,911.19 is: 75,708.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,797.38 : 90,718.10 = 54,911.19 : x
  2. Step 2: Convert to fraction form
    65,797.38/90,718.10 = 54,911.19/x
  3. Step 3: Cross multiply
    65,797.38x = 90,718.10 × 54,911.19
  4. Step 4: Simplify right side
    65,797.38x = 4,981,438,550.98
  5. Step 5: Solve for x
    x = 4,981,438,550.98/65,797.38
  6. Step 6: Final answer
    x = 75,708.77

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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.