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Finding the Fourth Proportional to 121,635.69, 167,936.23 and 108,866.72

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Solution

The fourth proportional to 121,635.69, 167,936.23 and 108,866.72 is: 150,306.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,635.69 : 167,936.23 = 108,866.72 : x
  2. Step 2: Convert to fraction form
    121,635.69/167,936.23 = 108,866.72/x
  3. Step 3: Cross multiply
    121,635.69x = 167,936.23 × 108,866.72
  4. Step 4: Simplify right side
    121,635.69x = 18,282,666,959.38
  5. Step 5: Solve for x
    x = 18,282,666,959.38/121,635.69
  6. Step 6: Final answer
    x = 150,306.77

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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.