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Finding the Fourth Proportional to 207,517.80, 286,362.82 and 122,642.76

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Solution

The fourth proportional to 207,517.80, 286,362.82 and 122,642.76 is: 169,240.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,517.80 : 286,362.82 = 122,642.76 : x
  2. Step 2: Convert to fraction form
    207,517.80/286,362.82 = 122,642.76/x
  3. Step 3: Cross multiply
    207,517.80x = 286,362.82 × 122,642.76
  4. Step 4: Simplify right side
    207,517.80x = 35,120,326,606.18
  5. Step 5: Solve for x
    x = 35,120,326,606.18/207,517.80
  6. Step 6: Final answer
    x = 169,240.07

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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.