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Finding the Fourth Proportional to 78,233.46, 117,069.84 and 67,739.70

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Solution

The fourth proportional to 78,233.46, 117,069.84 and 67,739.70 is: 101,366.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,233.46 : 117,069.84 = 67,739.70 : x
  2. Step 2: Convert to fraction form
    78,233.46/117,069.84 = 67,739.70/x
  3. Step 3: Cross multiply
    78,233.46x = 117,069.84 × 67,739.70
  4. Step 4: Simplify right side
    78,233.46x = 7,930,275,840.65
  5. Step 5: Solve for x
    x = 7,930,275,840.65/78,233.46
  6. Step 6: Final answer
    x = 101,366.80

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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.