Home / 78,929.24-117,378.90-76,437.41

Finding the Fourth Proportional to 78,929.24, 117,378.90 and 76,437.41

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Solution

The fourth proportional to 78,929.24, 117,378.90 and 76,437.41 is: 113,673.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,929.24 : 117,378.90 = 76,437.41 : x
  2. Step 2: Convert to fraction form
    78,929.24/117,378.90 = 76,437.41/x
  3. Step 3: Cross multiply
    78,929.24x = 117,378.90 × 76,437.41
  4. Step 4: Simplify right side
    78,929.24x = 8,972,138,517.75
  5. Step 5: Solve for x
    x = 8,972,138,517.75/78,929.24
  6. Step 6: Final answer
    x = 113,673.20

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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.