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Finding the Fourth Proportional to 121,066.97, 167,077.80 and 100,890.05

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Solution

The fourth proportional to 121,066.97, 167,077.80 and 100,890.05 is: 139,232.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,066.97 : 167,077.80 = 100,890.05 : x
  2. Step 2: Convert to fraction form
    121,066.97/167,077.80 = 100,890.05/x
  3. Step 3: Cross multiply
    121,066.97x = 167,077.80 × 100,890.05
  4. Step 4: Simplify right side
    121,066.97x = 16,856,487,595.89
  5. Step 5: Solve for x
    x = 16,856,487,595.89/121,066.97
  6. Step 6: Final answer
    x = 139,232.75

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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.