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Finding the Fourth Proportional to 115,245.76, 158,933.46 and 78,999.88

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Solution

The fourth proportional to 115,245.76, 158,933.46 and 78,999.88 is: 108,947.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,245.76 : 158,933.46 = 78,999.88 : x
  2. Step 2: Convert to fraction form
    115,245.76/158,933.46 = 78,999.88/x
  3. Step 3: Cross multiply
    115,245.76x = 158,933.46 × 78,999.88
  4. Step 4: Simplify right side
    115,245.76x = 12,555,724,267.98
  5. Step 5: Solve for x
    x = 12,555,724,267.98/115,245.76
  6. Step 6: Final answer
    x = 108,947.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.