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Finding the Fourth Proportional to 76,991.80, 115,487.70 and 50,726.20

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Solution

The fourth proportional to 76,991.80, 115,487.70 and 50,726.20 is: 76,089.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,991.80 : 115,487.70 = 50,726.20 : x
  2. Step 2: Convert to fraction form
    76,991.80/115,487.70 = 50,726.20/x
  3. Step 3: Cross multiply
    76,991.80x = 115,487.70 × 50,726.20
  4. Step 4: Simplify right side
    76,991.80x = 5,858,252,167.74
  5. Step 5: Solve for x
    x = 5,858,252,167.74/76,991.80
  6. Step 6: Final answer
    x = 76,089.30

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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.