Home / 78,587.26-108,452.87-42,779.66

Finding the Fourth Proportional to 78,587.26, 108,452.87 and 42,779.66

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Solution

The fourth proportional to 78,587.26, 108,452.87 and 42,779.66 is: 59,037.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,587.26 : 108,452.87 = 42,779.66 : x
  2. Step 2: Convert to fraction form
    78,587.26/108,452.87 = 42,779.66/x
  3. Step 3: Cross multiply
    78,587.26x = 108,452.87 × 42,779.66
  4. Step 4: Simplify right side
    78,587.26x = 4,639,576,419.59
  5. Step 5: Solve for x
    x = 4,639,576,419.59/78,587.26
  6. Step 6: Final answer
    x = 59,037.26

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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.