Home / 78,517.92-117,710.40-34,111.20

Finding the Fourth Proportional to 78,517.92, 117,710.40 and 34,111.20

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Solution

The fourth proportional to 78,517.92, 117,710.40 and 34,111.20 is: 51,137.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,517.92 : 117,710.40 = 34,111.20 : x
  2. Step 2: Convert to fraction form
    78,517.92/117,710.40 = 34,111.20/x
  3. Step 3: Cross multiply
    78,517.92x = 117,710.40 × 34,111.20
  4. Step 4: Simplify right side
    78,517.92x = 4,015,242,996.48
  5. Step 5: Solve for x
    x = 4,015,242,996.48/78,517.92
  6. Step 6: Final answer
    x = 51,137.92

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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.