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Finding the Fourth Proportional to 99,411.75, 137,188.22 and 54,699.75

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Solution

The fourth proportional to 99,411.75, 137,188.22 and 54,699.75 is: 75,485.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,411.75 : 137,188.22 = 54,699.75 : x
  2. Step 2: Convert to fraction form
    99,411.75/137,188.22 = 54,699.75/x
  3. Step 3: Cross multiply
    99,411.75x = 137,188.22 × 54,699.75
  4. Step 4: Simplify right side
    99,411.75x = 7,504,161,063.45
  5. Step 5: Solve for x
    x = 7,504,161,063.45/99,411.75
  6. Step 6: Final answer
    x = 75,485.66

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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.