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Finding the Fourth Proportional to 99,993.38, 137,991.11 and 54,674.28

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Solution

The fourth proportional to 99,993.38, 137,991.11 and 54,674.28 is: 75,450.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,993.38 : 137,991.11 = 54,674.28 : x
  2. Step 2: Convert to fraction form
    99,993.38/137,991.11 = 54,674.28/x
  3. Step 3: Cross multiply
    99,993.38x = 137,991.11 × 54,674.28
  4. Step 4: Simplify right side
    99,993.38x = 7,544,564,829.75
  5. Step 5: Solve for x
    x = 7,544,564,829.75/99,993.38
  6. Step 6: Final answer
    x = 75,450.65

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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.