Home / 278,831.82-418,246.89-79,152.38

Finding the Fourth Proportional to 278,831.82, 418,246.89 and 79,152.38

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Solution

The fourth proportional to 278,831.82, 418,246.89 and 79,152.38 is: 118,728.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,831.82 : 418,246.89 = 79,152.38 : x
  2. Step 2: Convert to fraction form
    278,831.82/418,246.89 = 79,152.38/x
  3. Step 3: Cross multiply
    278,831.82x = 418,246.89 × 79,152.38
  4. Step 4: Simplify right side
    278,831.82x = 33,105,236,771.10
  5. Step 5: Solve for x
    x = 33,105,236,771.10/278,831.82
  6. Step 6: Final answer
    x = 118,728.33

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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.