Home / 217,820.80-326,731.20-137,922.40

Finding the Fourth Proportional to 217,820.80, 326,731.20 and 137,922.40

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Solution

The fourth proportional to 217,820.80, 326,731.20 and 137,922.40 is: 206,883.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,820.80 : 326,731.20 = 137,922.40 : x
  2. Step 2: Convert to fraction form
    217,820.80/326,731.20 = 137,922.40/x
  3. Step 3: Cross multiply
    217,820.80x = 326,731.20 × 137,922.40
  4. Step 4: Simplify right side
    217,820.80x = 45,063,551,258.88
  5. Step 5: Solve for x
    x = 45,063,551,258.88/217,820.80
  6. Step 6: Final answer
    x = 206,883.60

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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.