Home / 78,609.24-108,480.09-42,799.20

Finding the Fourth Proportional to 78,609.24, 108,480.09 and 42,799.20

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Solution

The fourth proportional to 78,609.24, 108,480.09 and 42,799.20 is: 59,062.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,609.24 : 108,480.09 = 42,799.20 : x
  2. Step 2: Convert to fraction form
    78,609.24/108,480.09 = 42,799.20/x
  3. Step 3: Cross multiply
    78,609.24x = 108,480.09 × 42,799.20
  4. Step 4: Simplify right side
    78,609.24x = 4,642,861,067.93
  5. Step 5: Solve for x
    x = 4,642,861,067.93/78,609.24
  6. Step 6: Final answer
    x = 59,062.54

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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.