Home / 83,583.92-115,247.05-68,420.72

Finding the Fourth Proportional to 83,583.92, 115,247.05 and 68,420.72

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Solution

The fourth proportional to 83,583.92, 115,247.05 and 68,420.72 is: 94,339.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,583.92 : 115,247.05 = 68,420.72 : x
  2. Step 2: Convert to fraction form
    83,583.92/115,247.05 = 68,420.72/x
  3. Step 3: Cross multiply
    83,583.92x = 115,247.05 × 68,420.72
  4. Step 4: Simplify right side
    83,583.92x = 7,885,286,138.88
  5. Step 5: Solve for x
    x = 7,885,286,138.88/83,583.92
  6. Step 6: Final answer
    x = 94,339.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.