Home / 100,220.11-138,298.35-54,889.50

Finding the Fourth Proportional to 100,220.11, 138,298.35 and 54,889.50

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Solution

The fourth proportional to 100,220.11, 138,298.35 and 54,889.50 is: 75,744.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,220.11 : 138,298.35 = 54,889.50 : x
  2. Step 2: Convert to fraction form
    100,220.11/138,298.35 = 54,889.50/x
  3. Step 3: Cross multiply
    100,220.11x = 138,298.35 × 54,889.50
  4. Step 4: Simplify right side
    100,220.11x = 7,591,127,282.33
  5. Step 5: Solve for x
    x = 7,591,127,282.33/100,220.11
  6. Step 6: Final answer
    x = 75,744.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.