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Finding the Fourth Proportional to 124,073.80, 186,040.20 and 84,678.64

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Solution

The fourth proportional to 124,073.80, 186,040.20 and 84,678.64 is: 126,969.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,073.80 : 186,040.20 = 84,678.64 : x
  2. Step 2: Convert to fraction form
    124,073.80/186,040.20 = 84,678.64/x
  3. Step 3: Cross multiply
    124,073.80x = 186,040.20 × 84,678.64
  4. Step 4: Simplify right side
    124,073.80x = 15,753,631,121.33
  5. Step 5: Solve for x
    x = 15,753,631,121.33/124,073.80
  6. Step 6: Final answer
    x = 126,969.84

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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.