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Finding the Fourth Proportional to 66,490.68, 91,765.26 and 38,196.30

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Solution

The fourth proportional to 66,490.68, 91,765.26 and 38,196.30 is: 52,715.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,490.68 : 91,765.26 = 38,196.30 : x
  2. Step 2: Convert to fraction form
    66,490.68/91,765.26 = 38,196.30/x
  3. Step 3: Cross multiply
    66,490.68x = 91,765.26 × 38,196.30
  4. Step 4: Simplify right side
    66,490.68x = 3,505,093,400.54
  5. Step 5: Solve for x
    x = 3,505,093,400.54/66,490.68
  6. Step 6: Final answer
    x = 52,715.56

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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.