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Finding the Fourth Proportional to 220,568.71, 304,331.75 and 129,917.56

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Solution

The fourth proportional to 220,568.71, 304,331.75 and 129,917.56 is: 179,254.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,568.71 : 304,331.75 = 129,917.56 : x
  2. Step 2: Convert to fraction form
    220,568.71/304,331.75 = 129,917.56/x
  3. Step 3: Cross multiply
    220,568.71x = 304,331.75 × 129,917.56
  4. Step 4: Simplify right side
    220,568.71x = 39,538,038,390.53
  5. Step 5: Solve for x
    x = 39,538,038,390.53/220,568.71
  6. Step 6: Final answer
    x = 179,254.97

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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.