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Finding the Fourth Proportional to 90,978.78, 136,482.78 and 38,396.04

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Solution

The fourth proportional to 90,978.78, 136,482.78 and 38,396.04 is: 57,600.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,978.78 : 136,482.78 = 38,396.04 : x
  2. Step 2: Convert to fraction form
    90,978.78/136,482.78 = 38,396.04/x
  3. Step 3: Cross multiply
    90,978.78x = 136,482.78 × 38,396.04
  4. Step 4: Simplify right side
    90,978.78x = 5,240,398,280.19
  5. Step 5: Solve for x
    x = 5,240,398,280.19/90,978.78
  6. Step 6: Final answer
    x = 57,600.23

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