Home / 189,162.68-261,047.40-103,121.72

Finding the Fourth Proportional to 189,162.68, 261,047.40 and 103,121.72

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Solution

The fourth proportional to 189,162.68, 261,047.40 and 103,121.72 is: 142,309.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,162.68 : 261,047.40 = 103,121.72 : x
  2. Step 2: Convert to fraction form
    189,162.68/261,047.40 = 103,121.72/x
  3. Step 3: Cross multiply
    189,162.68x = 261,047.40 × 103,121.72
  4. Step 4: Simplify right side
    189,162.68x = 26,919,655,584.29
  5. Step 5: Solve for x
    x = 26,919,655,584.29/189,162.68
  6. Step 6: Final answer
    x = 142,309.55

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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.