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Finding the Fourth Proportional to 121,516.78, 167,693.62 and 67,804.06

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Solution

The fourth proportional to 121,516.78, 167,693.62 and 67,804.06 is: 93,569.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,516.78 : 167,693.62 = 67,804.06 : x
  2. Step 2: Convert to fraction form
    121,516.78/167,693.62 = 67,804.06/x
  3. Step 3: Cross multiply
    121,516.78x = 167,693.62 × 67,804.06
  4. Step 4: Simplify right side
    121,516.78x = 11,370,308,272.10
  5. Step 5: Solve for x
    x = 11,370,308,272.10/121,516.78
  6. Step 6: Final answer
    x = 93,569.86

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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.