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Finding the Fourth Proportional to 102,686.43, 141,615.17 and 85,515.65

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Solution

The fourth proportional to 102,686.43, 141,615.17 and 85,515.65 is: 117,934.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,686.43 : 141,615.17 = 85,515.65 : x
  2. Step 2: Convert to fraction form
    102,686.43/141,615.17 = 85,515.65/x
  3. Step 3: Cross multiply
    102,686.43x = 141,615.17 × 85,515.65
  4. Step 4: Simplify right side
    102,686.43x = 12,110,312,604.33
  5. Step 5: Solve for x
    x = 12,110,312,604.33/102,686.43
  6. Step 6: Final answer
    x = 117,934.89

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