Home / 109,264.20-163,961.10-71,931.30

Finding the Fourth Proportional to 109,264.20, 163,961.10 and 71,931.30

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Solution

The fourth proportional to 109,264.20, 163,961.10 and 71,931.30 is: 107,939.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,264.20 : 163,961.10 = 71,931.30 : x
  2. Step 2: Convert to fraction form
    109,264.20/163,961.10 = 71,931.30/x
  3. Step 3: Cross multiply
    109,264.20x = 163,961.10 × 71,931.30
  4. Step 4: Simplify right side
    109,264.20x = 11,793,935,072.43
  5. Step 5: Solve for x
    x = 11,793,935,072.43/109,264.20
  6. Step 6: Final answer
    x = 107,939.61

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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.