Home / 149,381.20-206,143.38-81,398.76

Finding the Fourth Proportional to 149,381.20, 206,143.38 and 81,398.76

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Solution

The fourth proportional to 149,381.20, 206,143.38 and 81,398.76 is: 112,328.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,381.20 : 206,143.38 = 81,398.76 : x
  2. Step 2: Convert to fraction form
    149,381.20/206,143.38 = 81,398.76/x
  3. Step 3: Cross multiply
    149,381.20x = 206,143.38 × 81,398.76
  4. Step 4: Simplify right side
    149,381.20x = 16,779,815,514.21
  5. Step 5: Solve for x
    x = 16,779,815,514.21/149,381.20
  6. Step 6: Final answer
    x = 112,328.83

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1.5x scale

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.