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Finding the Fourth Proportional to 66,235, 91,404.74 and 36,020.66

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Solution

The fourth proportional to 66,235, 91,404.74 and 36,020.66 is: 49,708.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,235 : 91,404.74 = 36,020.66 : x
  2. Step 2: Convert to fraction form
    66,235/91,404.74 = 36,020.66/x
  3. Step 3: Cross multiply
    66,235x = 91,404.74 × 36,020.66
  4. Step 4: Simplify right side
    66,235x = 3,292,459,061.93
  5. Step 5: Solve for x
    x = 3,292,459,061.93/66,235
  6. Step 6: Final answer
    x = 49,708.75

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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.