Home / 78,084.54-117,142.20-25,479.90

Finding the Fourth Proportional to 78,084.54, 117,142.20 and 25,479.90

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Solution

The fourth proportional to 78,084.54, 117,142.20 and 25,479.90 is: 38,224.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,084.54 : 117,142.20 = 25,479.90 : x
  2. Step 2: Convert to fraction form
    78,084.54/117,142.20 = 25,479.90/x
  3. Step 3: Cross multiply
    78,084.54x = 117,142.20 × 25,479.90
  4. Step 4: Simplify right side
    78,084.54x = 2,984,771,541.78
  5. Step 5: Solve for x
    x = 2,984,771,541.78/78,084.54
  6. Step 6: Final answer
    x = 38,224.87

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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.