Home / 78,429.26-108,230.19-42,618.08

Finding the Fourth Proportional to 78,429.26, 108,230.19 and 42,618.08

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Solution

The fourth proportional to 78,429.26, 108,230.19 and 42,618.08 is: 58,811.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,429.26 : 108,230.19 = 42,618.08 : x
  2. Step 2: Convert to fraction form
    78,429.26/108,230.19 = 42,618.08/x
  3. Step 3: Cross multiply
    78,429.26x = 108,230.19 × 42,618.08
  4. Step 4: Simplify right side
    78,429.26x = 4,612,562,731.80
  5. Step 5: Solve for x
    x = 4,612,562,731.80/78,429.26
  6. Step 6: Final answer
    x = 58,811.76

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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.