Home / 112,769.64-155,620.21-61,781.90

Finding the Fourth Proportional to 112,769.64, 155,620.21 and 61,781.90

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Solution

The fourth proportional to 112,769.64, 155,620.21 and 61,781.90 is: 85,257.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,769.64 : 155,620.21 = 61,781.90 : x
  2. Step 2: Convert to fraction form
    112,769.64/155,620.21 = 61,781.90/x
  3. Step 3: Cross multiply
    112,769.64x = 155,620.21 × 61,781.90
  4. Step 4: Simplify right side
    112,769.64x = 9,614,512,252.20
  5. Step 5: Solve for x
    x = 9,614,512,252.20/112,769.64
  6. Step 6: Final answer
    x = 85,257.98

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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.