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Finding the Fourth Proportional to 91,615.20, 137,428.24 and 28,441.28

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Solution

The fourth proportional to 91,615.20, 137,428.24 and 28,441.28 is: 42,663.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,615.20 : 137,428.24 = 28,441.28 : x
  2. Step 2: Convert to fraction form
    91,615.20/137,428.24 = 28,441.28/x
  3. Step 3: Cross multiply
    91,615.20x = 137,428.24 × 28,441.28
  4. Step 4: Simplify right side
    91,615.20x = 3,908,635,053.75
  5. Step 5: Solve for x
    x = 3,908,635,053.75/91,615.20
  6. Step 6: Final answer
    x = 42,663.61

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