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Finding the Fourth Proportional to 121,390.53, 167,506.83 and 73,641.03

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Solution

The fourth proportional to 121,390.53, 167,506.83 and 73,641.03 is: 101,617.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,390.53 : 167,506.83 = 73,641.03 : x
  2. Step 2: Convert to fraction form
    121,390.53/167,506.83 = 73,641.03/x
  3. Step 3: Cross multiply
    121,390.53x = 167,506.83 × 73,641.03
  4. Step 4: Simplify right side
    121,390.53x = 12,335,375,493.23
  5. Step 5: Solve for x
    x = 12,335,375,493.23/121,390.53
  6. Step 6: Final answer
    x = 101,617.28

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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.