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Finding the Fourth Proportional to 66,509.64, 91,799.01 and 38,231.73

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Solution

The fourth proportional to 66,509.64, 91,799.01 and 38,231.73 is: 52,768.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,509.64 : 91,799.01 = 38,231.73 : x
  2. Step 2: Convert to fraction form
    66,509.64/91,799.01 = 38,231.73/x
  3. Step 3: Cross multiply
    66,509.64x = 91,799.01 × 38,231.73
  4. Step 4: Simplify right side
    66,509.64x = 3,509,634,964.59
  5. Step 5: Solve for x
    x = 3,509,634,964.59/66,509.64
  6. Step 6: Final answer
    x = 52,768.82

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.