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Finding the Fourth Proportional to 121,354.38, 167,087.93 and 103,169.32

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Solution

The fourth proportional to 121,354.38, 167,087.93 and 103,169.32 is: 142,049.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,354.38 : 167,087.93 = 103,169.32 : x
  2. Step 2: Convert to fraction form
    121,354.38/167,087.93 = 103,169.32/x
  3. Step 3: Cross multiply
    121,354.38x = 167,087.93 × 103,169.32
  4. Step 4: Simplify right side
    121,354.38x = 17,238,347,184.74
  5. Step 5: Solve for x
    x = 17,238,347,184.74/121,354.38
  6. Step 6: Final answer
    x = 142,049.65

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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.