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Finding the Fourth Proportional to 99,759.71, 137,664.11 and 54,436.56

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Solution

The fourth proportional to 99,759.71, 137,664.11 and 54,436.56 is: 75,120.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,759.71 : 137,664.11 = 54,436.56 : x
  2. Step 2: Convert to fraction form
    99,759.71/137,664.11 = 54,436.56/x
  3. Step 3: Cross multiply
    99,759.71x = 137,664.11 × 54,436.56
  4. Step 4: Simplify right side
    99,759.71x = 7,493,960,583.86
  5. Step 5: Solve for x
    x = 7,493,960,583.86/99,759.71
  6. Step 6: Final answer
    x = 75,120.11

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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.