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Finding the Fourth Proportional to 99,760.98, 149,641.62 and 79,896.78

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Solution

The fourth proportional to 99,760.98, 149,641.62 and 79,896.78 is: 119,845.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,760.98 : 149,641.62 = 79,896.78 : x
  2. Step 2: Convert to fraction form
    99,760.98/149,641.62 = 79,896.78/x
  3. Step 3: Cross multiply
    99,760.98x = 149,641.62 × 79,896.78
  4. Step 4: Simplify right side
    99,760.98x = 11,955,883,591.98
  5. Step 5: Solve for x
    x = 11,955,883,591.98/99,760.98
  6. Step 6: Final answer
    x = 119,845.29

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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.