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Finding the Fourth Proportional to 157,263.12, 217,023.12 and 85,643.12

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Solution

The fourth proportional to 157,263.12, 217,023.12 and 85,643.12 is: 118,187.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,263.12 : 217,023.12 = 85,643.12 : x
  2. Step 2: Convert to fraction form
    157,263.12/217,023.12 = 85,643.12/x
  3. Step 3: Cross multiply
    157,263.12x = 217,023.12 × 85,643.12
  4. Step 4: Simplify right side
    157,263.12x = 18,586,537,108.93
  5. Step 5: Solve for x
    x = 18,586,537,108.93/157,263.12
  6. Step 6: Final answer
    x = 118,187.51

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