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Finding the Fourth Proportional to 100,449.96, 150,674.95 and 78,279.95

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Solution

The fourth proportional to 100,449.96, 150,674.95 and 78,279.95 is: 117,419.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,449.96 : 150,674.95 = 78,279.95 : x
  2. Step 2: Convert to fraction form
    100,449.96/150,674.95 = 78,279.95/x
  3. Step 3: Cross multiply
    100,449.96x = 150,674.95 × 78,279.95
  4. Step 4: Simplify right side
    100,449.96x = 11,794,826,798.88
  5. Step 5: Solve for x
    x = 11,794,826,798.88/100,449.96
  6. Step 6: Final answer
    x = 117,419.93

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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.