Home / 141,772.72-195,644.28-78,108.88

Finding the Fourth Proportional to 141,772.72, 195,644.28 and 78,108.88

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Solution

The fourth proportional to 141,772.72, 195,644.28 and 78,108.88 is: 107,789.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,772.72 : 195,644.28 = 78,108.88 : x
  2. Step 2: Convert to fraction form
    141,772.72/195,644.28 = 78,108.88/x
  3. Step 3: Cross multiply
    141,772.72x = 195,644.28 × 78,108.88
  4. Step 4: Simplify right side
    141,772.72x = 15,281,555,589.21
  5. Step 5: Solve for x
    x = 15,281,555,589.21/141,772.72
  6. Step 6: Final answer
    x = 107,789.11

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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.