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Finding the Fourth Proportional to 66,571.13, 91,868.78 and 37,889.38

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Solution

The fourth proportional to 66,571.13, 91,868.78 and 37,889.38 is: 52,287.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,571.13 : 91,868.78 = 37,889.38 : x
  2. Step 2: Convert to fraction form
    66,571.13/91,868.78 = 37,889.38/x
  3. Step 3: Cross multiply
    66,571.13x = 91,868.78 × 37,889.38
  4. Step 4: Simplify right side
    66,571.13x = 3,480,851,115.56
  5. Step 5: Solve for x
    x = 3,480,851,115.56/66,571.13
  6. Step 6: Final answer
    x = 52,287.70

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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.