Home / 220,724.78-304,507.30-138,908.10

Finding the Fourth Proportional to 220,724.78, 304,507.30 and 138,908.10

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Solution

The fourth proportional to 220,724.78, 304,507.30 and 138,908.10 is: 191,634.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,724.78 : 304,507.30 = 138,908.10 : x
  2. Step 2: Convert to fraction form
    220,724.78/304,507.30 = 138,908.10/x
  3. Step 3: Cross multiply
    220,724.78x = 304,507.30 × 138,908.10
  4. Step 4: Simplify right side
    220,724.78x = 42,298,530,479.13
  5. Step 5: Solve for x
    x = 42,298,530,479.13/220,724.78
  6. Step 6: Final answer
    x = 191,634.72

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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.