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Finding the Fourth Proportional to 124,538.40, 186,831.90 and 49,645.80

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Solution

The fourth proportional to 124,538.40, 186,831.90 and 49,645.80 is: 74,478.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,538.40 : 186,831.90 = 49,645.80 : x
  2. Step 2: Convert to fraction form
    124,538.40/186,831.90 = 49,645.80/x
  3. Step 3: Cross multiply
    124,538.40x = 186,831.90 × 49,645.80
  4. Step 4: Simplify right side
    124,538.40x = 9,275,419,141.02
  5. Step 5: Solve for x
    x = 9,275,419,141.02/124,538.40
  6. Step 6: Final answer
    x = 74,478.39

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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.