Home / 78,158.66-117,214.04-28,232.60

Finding the Fourth Proportional to 78,158.66, 117,214.04 and 28,232.60

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Solution

The fourth proportional to 78,158.66, 117,214.04 and 28,232.60 is: 42,340.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,158.66 : 117,214.04 = 28,232.60 : x
  2. Step 2: Convert to fraction form
    78,158.66/117,214.04 = 28,232.60/x
  3. Step 3: Cross multiply
    78,158.66x = 117,214.04 × 28,232.60
  4. Step 4: Simplify right side
    78,158.66x = 3,309,257,105.70
  5. Step 5: Solve for x
    x = 3,309,257,105.70/78,158.66
  6. Step 6: Final answer
    x = 42,340.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.