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Finding the Fourth Proportional to 207,104.58, 310,774.86 and 80,728.38

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Solution

The fourth proportional to 207,104.58, 310,774.86 and 80,728.38 is: 121,138.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,104.58 : 310,774.86 = 80,728.38 : x
  2. Step 2: Convert to fraction form
    207,104.58/310,774.86 = 80,728.38/x
  3. Step 3: Cross multiply
    207,104.58x = 310,774.86 × 80,728.38
  4. Step 4: Simplify right side
    207,104.58x = 25,088,350,992.53
  5. Step 5: Solve for x
    x = 25,088,350,992.53/207,104.58
  6. Step 6: Final answer
    x = 121,138.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.