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Finding the Fourth Proportional to 121,870.10, 182,731.34 and 79,699.28

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Solution

The fourth proportional to 121,870.10, 182,731.34 and 79,699.28 is: 119,500.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,870.10 : 182,731.34 = 79,699.28 : x
  2. Step 2: Convert to fraction form
    121,870.10/182,731.34 = 79,699.28/x
  3. Step 3: Cross multiply
    121,870.10x = 182,731.34 × 79,699.28
  4. Step 4: Simplify right side
    121,870.10x = 14,563,556,231.44
  5. Step 5: Solve for x
    x = 14,563,556,231.44/121,870.10
  6. Step 6: Final answer
    x = 119,500.65

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