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Finding the Fourth Proportional to 121,570.72, 167,760.76 and 67,859.19

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Solution

The fourth proportional to 121,570.72, 167,760.76 and 67,859.19 is: 93,641.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,570.72 : 167,760.76 = 67,859.19 : x
  2. Step 2: Convert to fraction form
    121,570.72/167,760.76 = 67,859.19/x
  3. Step 3: Cross multiply
    121,570.72x = 167,760.76 × 67,859.19
  4. Step 4: Simplify right side
    121,570.72x = 11,384,109,287.38
  5. Step 5: Solve for x
    x = 11,384,109,287.38/121,570.72
  6. Step 6: Final answer
    x = 93,641.87

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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.