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Finding the Fourth Proportional to 123,486.54, 170,348.79 and 78,088.02

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Solution

The fourth proportional to 123,486.54, 170,348.79 and 78,088.02 is: 107,721.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,486.54 : 170,348.79 = 78,088.02 : x
  2. Step 2: Convert to fraction form
    123,486.54/170,348.79 = 78,088.02/x
  3. Step 3: Cross multiply
    123,486.54x = 170,348.79 × 78,088.02
  4. Step 4: Simplify right side
    123,486.54x = 13,302,199,720.50
  5. Step 5: Solve for x
    x = 13,302,199,720.50/123,486.54
  6. Step 6: Final answer
    x = 107,721.86

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