Home / 83,831.40-125,732.70-31,213.80

Finding the Fourth Proportional to 83,831.40, 125,732.70 and 31,213.80

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Solution

The fourth proportional to 83,831.40, 125,732.70 and 31,213.80 is: 46,815.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,831.40 : 125,732.70 = 31,213.80 : x
  2. Step 2: Convert to fraction form
    83,831.40/125,732.70 = 31,213.80/x
  3. Step 3: Cross multiply
    83,831.40x = 125,732.70 × 31,213.80
  4. Step 4: Simplify right side
    83,831.40x = 3,924,595,351.26
  5. Step 5: Solve for x
    x = 3,924,595,351.26/83,831.40
  6. Step 6: Final answer
    x = 46,815.34

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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.