Home / 136,687.20-188,348.38-100,820.40

Finding the Fourth Proportional to 136,687.20, 188,348.38 and 100,820.40

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Solution

The fourth proportional to 136,687.20, 188,348.38 and 100,820.40 is: 138,925.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,687.20 : 188,348.38 = 100,820.40 : x
  2. Step 2: Convert to fraction form
    136,687.20/188,348.38 = 100,820.40/x
  3. Step 3: Cross multiply
    136,687.20x = 188,348.38 × 100,820.40
  4. Step 4: Simplify right side
    136,687.20x = 18,989,359,010.95
  5. Step 5: Solve for x
    x = 18,989,359,010.95/136,687.20
  6. Step 6: Final answer
    x = 138,925.66

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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.