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Finding the Fourth Proportional to 66,609.15, 91,919.55 and 36,393.82

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Solution

The fourth proportional to 66,609.15, 91,919.55 and 36,393.82 is: 50,222.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,609.15 : 91,919.55 = 36,393.82 : x
  2. Step 2: Convert to fraction form
    66,609.15/91,919.55 = 36,393.82/x
  3. Step 3: Cross multiply
    66,609.15x = 91,919.55 × 36,393.82
  4. Step 4: Simplify right side
    66,609.15x = 3,345,303,557.18
  5. Step 5: Solve for x
    x = 3,345,303,557.18/66,609.15
  6. Step 6: Final answer
    x = 50,222.88

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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.