Home / 83,828.40-125,728.20-31,210.80

Finding the Fourth Proportional to 83,828.40, 125,728.20 and 31,210.80

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Solution

The fourth proportional to 83,828.40, 125,728.20 and 31,210.80 is: 46,810.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,828.40 : 125,728.20 = 31,210.80 : x
  2. Step 2: Convert to fraction form
    83,828.40/125,728.20 = 31,210.80/x
  3. Step 3: Cross multiply
    83,828.40x = 125,728.20 × 31,210.80
  4. Step 4: Simplify right side
    83,828.40x = 3,924,077,704.56
  5. Step 5: Solve for x
    x = 3,924,077,704.56/83,828.40
  6. Step 6: Final answer
    x = 46,810.84

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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.