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Finding the Fourth Proportional to 121,564.71, 167,759.51 and 67,849.72

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Solution

The fourth proportional to 121,564.71, 167,759.51 and 67,849.72 is: 93,632.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,564.71 : 167,759.51 = 67,849.72 : x
  2. Step 2: Convert to fraction form
    121,564.71/167,759.51 = 67,849.72/x
  3. Step 3: Cross multiply
    121,564.71x = 167,759.51 × 67,849.72
  4. Step 4: Simplify right side
    121,564.71x = 11,382,435,022.19
  5. Step 5: Solve for x
    x = 11,382,435,022.19/121,564.71
  6. Step 6: Final answer
    x = 93,632.72

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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.