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Finding the Fourth Proportional to 126,187.71, 174,138.71 and 72,476.21

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Solution

The fourth proportional to 126,187.71, 174,138.71 and 72,476.21 is: 100,016.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,187.71 : 174,138.71 = 72,476.21 : x
  2. Step 2: Convert to fraction form
    126,187.71/174,138.71 = 72,476.21/x
  3. Step 3: Cross multiply
    126,187.71x = 174,138.71 × 72,476.21
  4. Step 4: Simplify right side
    126,187.71x = 12,620,912,482.01
  5. Step 5: Solve for x
    x = 12,620,912,482.01/126,187.71
  6. Step 6: Final answer
    x = 100,016.97

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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.