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Finding the Fourth Proportional to 109,684.32, 151,370.28 and 61,939.68

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Solution

The fourth proportional to 109,684.32, 151,370.28 and 61,939.68 is: 85,480.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,684.32 : 151,370.28 = 61,939.68 : x
  2. Step 2: Convert to fraction form
    109,684.32/151,370.28 = 61,939.68/x
  3. Step 3: Cross multiply
    109,684.32x = 151,370.28 × 61,939.68
  4. Step 4: Simplify right side
    109,684.32x = 9,375,826,704.71
  5. Step 5: Solve for x
    x = 9,375,826,704.71/109,684.32
  6. Step 6: Final answer
    x = 85,480.10

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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.