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Finding the Fourth Proportional to 90,348.71, 135,534 and 85,373.29

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Solution

The fourth proportional to 90,348.71, 135,534 and 85,373.29 is: 128,070.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,348.71 : 135,534 = 85,373.29 : x
  2. Step 2: Convert to fraction form
    90,348.71/135,534 = 85,373.29/x
  3. Step 3: Cross multiply
    90,348.71x = 135,534 × 85,373.29
  4. Step 4: Simplify right side
    90,348.71x = 11,570,982,809.19
  5. Step 5: Solve for x
    x = 11,570,982,809.19/90,348.71
  6. Step 6: Final answer
    x = 128,070.26

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