Home / 78,629.55-117,374.24-72,775.91

Finding the Fourth Proportional to 78,629.55, 117,374.24 and 72,775.91

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Solution

The fourth proportional to 78,629.55, 117,374.24 and 72,775.91 is: 108,636.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,629.55 : 117,374.24 = 72,775.91 : x
  2. Step 2: Convert to fraction form
    78,629.55/117,374.24 = 72,775.91/x
  3. Step 3: Cross multiply
    78,629.55x = 117,374.24 × 72,775.91
  4. Step 4: Simplify right side
    78,629.55x = 8,542,016,175.81
  5. Step 5: Solve for x
    x = 8,542,016,175.81/78,629.55
  6. Step 6: Final answer
    x = 108,636.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.