Home / 138,479.18-207,783.35-54,217.48

Finding the Fourth Proportional to 138,479.18, 207,783.35 and 54,217.48

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Solution

The fourth proportional to 138,479.18, 207,783.35 and 54,217.48 is: 81,351.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,479.18 : 207,783.35 = 54,217.48 : x
  2. Step 2: Convert to fraction form
    138,479.18/207,783.35 = 54,217.48/x
  3. Step 3: Cross multiply
    138,479.18x = 207,783.35 × 54,217.48
  4. Step 4: Simplify right side
    138,479.18x = 11,265,489,622.96
  5. Step 5: Solve for x
    x = 11,265,489,622.96/138,479.18
  6. Step 6: Final answer
    x = 81,351.50

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1.5x scale

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.