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Finding the Fourth Proportional to 207,685.71, 312,178.86 and 137,062.20

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Solution

The fourth proportional to 207,685.71, 312,178.86 and 137,062.20 is: 206,022.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,685.71 : 312,178.86 = 137,062.20 : x
  2. Step 2: Convert to fraction form
    207,685.71/312,178.86 = 137,062.20/x
  3. Step 3: Cross multiply
    207,685.71x = 312,178.86 × 137,062.20
  4. Step 4: Simplify right side
    207,685.71x = 42,787,921,345.09
  5. Step 5: Solve for x
    x = 42,787,921,345.09/207,685.71
  6. Step 6: Final answer
    x = 206,022.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.