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Finding the Fourth Proportional to 76,909.40, 115,266.90 and 68,550.20

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Solution

The fourth proportional to 76,909.40, 115,266.90 and 68,550.20 is: 102,738.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,909.40 : 115,266.90 = 68,550.20 : x
  2. Step 2: Convert to fraction form
    76,909.40/115,266.90 = 68,550.20/x
  3. Step 3: Cross multiply
    76,909.40x = 115,266.90 × 68,550.20
  4. Step 4: Simplify right side
    76,909.40x = 7,901,569,048.38
  5. Step 5: Solve for x
    x = 7,901,569,048.38/76,909.40
  6. Step 6: Final answer
    x = 102,738.66

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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.