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Finding the Fourth Proportional to 121,157.97, 167,249.69 and 86,255.12

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Solution

The fourth proportional to 121,157.97, 167,249.69 and 86,255.12 is: 119,068.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,157.97 : 167,249.69 = 86,255.12 : x
  2. Step 2: Convert to fraction form
    121,157.97/167,249.69 = 86,255.12/x
  3. Step 3: Cross multiply
    121,157.97x = 167,249.69 × 86,255.12
  4. Step 4: Simplify right side
    121,157.97x = 14,426,142,067.76
  5. Step 5: Solve for x
    x = 14,426,142,067.76/121,157.97
  6. Step 6: Final answer
    x = 119,068.87

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1.5x scale

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.