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Finding the Fourth Proportional to 65,803.43, 90,726.34 and 54,917.18

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Solution

The fourth proportional to 65,803.43, 90,726.34 and 54,917.18 is: 75,716.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,803.43 : 90,726.34 = 54,917.18 : x
  2. Step 2: Convert to fraction form
    65,803.43/90,726.34 = 54,917.18/x
  3. Step 3: Cross multiply
    65,803.43x = 90,726.34 × 54,917.18
  4. Step 4: Simplify right side
    65,803.43x = 4,982,434,744.52
  5. Step 5: Solve for x
    x = 4,982,434,744.52/65,803.43
  6. Step 6: Final answer
    x = 75,716.95

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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.