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Finding the Fourth Proportional to 70,941.64, 106,428.12 and 21,025.72

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Solution

The fourth proportional to 70,941.64, 106,428.12 and 21,025.72 is: 31,543.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,941.64 : 106,428.12 = 21,025.72 : x
  2. Step 2: Convert to fraction form
    70,941.64/106,428.12 = 21,025.72/x
  3. Step 3: Cross multiply
    70,941.64x = 106,428.12 × 21,025.72
  4. Step 4: Simplify right side
    70,941.64x = 2,237,727,851.25
  5. Step 5: Solve for x
    x = 2,237,727,851.25/70,941.64
  6. Step 6: Final answer
    x = 31,543.22

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