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Finding the Fourth Proportional to 136,999.92, 189,061.20 and 80,412.24

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Solution

The fourth proportional to 136,999.92, 189,061.20 and 80,412.24 is: 110,969.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,999.92 : 189,061.20 = 80,412.24 : x
  2. Step 2: Convert to fraction form
    136,999.92/189,061.20 = 80,412.24/x
  3. Step 3: Cross multiply
    136,999.92x = 189,061.20 × 80,412.24
  4. Step 4: Simplify right side
    136,999.92x = 15,202,834,589.09
  5. Step 5: Solve for x
    x = 15,202,834,589.09/136,999.92
  6. Step 6: Final answer
    x = 110,969.66

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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.