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Finding the Fourth Proportional to 133,591.80, 199,993.86 and 98,687.28

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Solution

The fourth proportional to 133,591.80, 199,993.86 and 98,687.28 is: 147,739.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,591.80 : 199,993.86 = 98,687.28 : x
  2. Step 2: Convert to fraction form
    133,591.80/199,993.86 = 98,687.28/x
  3. Step 3: Cross multiply
    133,591.80x = 199,993.86 × 98,687.28
  4. Step 4: Simplify right side
    133,591.80x = 19,736,850,060.10
  5. Step 5: Solve for x
    x = 19,736,850,060.10/133,591.80
  6. Step 6: Final answer
    x = 147,739.98

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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.