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Finding the Fourth Proportional to 76,764.95, 115,131.54 and 20,591.71

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Solution

The fourth proportional to 76,764.95, 115,131.54 and 20,591.71 is: 30,883.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,764.95 : 115,131.54 = 20,591.71 : x
  2. Step 2: Convert to fraction form
    76,764.95/115,131.54 = 20,591.71/x
  3. Step 3: Cross multiply
    76,764.95x = 115,131.54 × 20,591.71
  4. Step 4: Simplify right side
    76,764.95x = 2,370,755,072.92
  5. Step 5: Solve for x
    x = 2,370,755,072.92/76,764.95
  6. Step 6: Final answer
    x = 30,883.30

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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.