Home / 78,786.20-108,720.96-42,975.92

Finding the Fourth Proportional to 78,786.20, 108,720.96 and 42,975.92

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Solution

The fourth proportional to 78,786.20, 108,720.96 and 42,975.92 is: 59,304.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,786.20 : 108,720.96 = 42,975.92 : x
  2. Step 2: Convert to fraction form
    78,786.20/108,720.96 = 42,975.92/x
  3. Step 3: Cross multiply
    78,786.20x = 108,720.96 × 42,975.92
  4. Step 4: Simplify right side
    78,786.20x = 4,672,383,279.28
  5. Step 5: Solve for x
    x = 4,672,383,279.28/78,786.20
  6. Step 6: Final answer
    x = 59,304.59

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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.