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Finding the Fourth Proportional to 209,480.96, 289,079 and 113,987.92

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Solution

The fourth proportional to 209,480.96, 289,079 and 113,987.92 is: 157,300.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,480.96 : 289,079 = 113,987.92 : x
  2. Step 2: Convert to fraction form
    209,480.96/289,079 = 113,987.92/x
  3. Step 3: Cross multiply
    209,480.96x = 289,079 × 113,987.92
  4. Step 4: Simplify right side
    209,480.96x = 32,951,513,925.68
  5. Step 5: Solve for x
    x = 32,951,513,925.68/209,480.96
  6. Step 6: Final answer
    x = 157,300.76

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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.