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Finding the Fourth Proportional to 109,217.66, 150,720.72 and 61,471.76

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Solution

The fourth proportional to 109,217.66, 150,720.72 and 61,471.76 is: 84,831.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,217.66 : 150,720.72 = 61,471.76 : x
  2. Step 2: Convert to fraction form
    109,217.66/150,720.72 = 61,471.76/x
  3. Step 3: Cross multiply
    109,217.66x = 150,720.72 × 61,471.76
  4. Step 4: Simplify right side
    109,217.66x = 9,265,067,926.87
  5. Step 5: Solve for x
    x = 9,265,067,926.87/109,217.66
  6. Step 6: Final answer
    x = 84,831.23

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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.