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Finding the Fourth Proportional to 77,278.60, 115,917.90 and 32,906.80

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Solution

The fourth proportional to 77,278.60, 115,917.90 and 32,906.80 is: 49,360.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,278.60 : 115,917.90 = 32,906.80 : x
  2. Step 2: Convert to fraction form
    77,278.60/115,917.90 = 32,906.80/x
  3. Step 3: Cross multiply
    77,278.60x = 115,917.90 × 32,906.80
  4. Step 4: Simplify right side
    77,278.60x = 3,814,487,151.72
  5. Step 5: Solve for x
    x = 3,814,487,151.72/77,278.60
  6. Step 6: Final answer
    x = 49,360.20

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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.