Home / 79,129.30-109,200.35-43,319.20

Finding the Fourth Proportional to 79,129.30, 109,200.35 and 43,319.20

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Solution

The fourth proportional to 79,129.30, 109,200.35 and 43,319.20 is: 59,781.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,129.30 : 109,200.35 = 43,319.20 : x
  2. Step 2: Convert to fraction form
    79,129.30/109,200.35 = 43,319.20/x
  3. Step 3: Cross multiply
    79,129.30x = 109,200.35 × 43,319.20
  4. Step 4: Simplify right side
    79,129.30x = 4,730,471,801.72
  5. Step 5: Solve for x
    x = 4,730,471,801.72/79,129.30
  6. Step 6: Final answer
    x = 59,781.54

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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.