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Finding the Fourth Proportional to 121,175.52, 167,249.79 and 78,660.24

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Solution

The fourth proportional to 121,175.52, 167,249.79 and 78,660.24 is: 108,569.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,175.52 : 167,249.79 = 78,660.24 : x
  2. Step 2: Convert to fraction form
    121,175.52/167,249.79 = 78,660.24/x
  3. Step 3: Cross multiply
    121,175.52x = 167,249.79 × 78,660.24
  4. Step 4: Simplify right side
    121,175.52x = 13,155,908,621.35
  5. Step 5: Solve for x
    x = 13,155,908,621.35/121,175.52
  6. Step 6: Final answer
    x = 108,569.03

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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.