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Finding the Fourth Proportional to 136,689.80, 188,632.06 and 80,101.13

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Solution

The fourth proportional to 136,689.80, 188,632.06 and 80,101.13 is: 110,539.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,689.80 : 188,632.06 = 80,101.13 : x
  2. Step 2: Convert to fraction form
    136,689.80/188,632.06 = 80,101.13/x
  3. Step 3: Cross multiply
    136,689.80x = 188,632.06 × 80,101.13
  4. Step 4: Simplify right side
    136,689.80x = 15,109,640,016.81
  5. Step 5: Solve for x
    x = 15,109,640,016.81/136,689.80
  6. Step 6: Final answer
    x = 110,539.63

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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.