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Finding the Fourth Proportional to 66,231.88, 91,405.11 and 37,938.13

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Solution

The fourth proportional to 66,231.88, 91,405.11 and 37,938.13 is: 52,357.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,231.88 : 91,405.11 = 37,938.13 : x
  2. Step 2: Convert to fraction form
    66,231.88/91,405.11 = 37,938.13/x
  3. Step 3: Cross multiply
    66,231.88x = 91,405.11 × 37,938.13
  4. Step 4: Simplify right side
    66,231.88x = 3,467,738,945.84
  5. Step 5: Solve for x
    x = 3,467,738,945.84/66,231.88
  6. Step 6: Final answer
    x = 52,357.55

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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.