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Finding the Fourth Proportional to 121,356.80, 181,986.60 and 42,430.40

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Solution

The fourth proportional to 121,356.80, 181,986.60 and 42,430.40 is: 63,628.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,356.80 : 181,986.60 = 42,430.40 : x
  2. Step 2: Convert to fraction form
    121,356.80/181,986.60 = 42,430.40/x
  3. Step 3: Cross multiply
    121,356.80x = 181,986.60 × 42,430.40
  4. Step 4: Simplify right side
    121,356.80x = 7,721,764,232.64
  5. Step 5: Solve for x
    x = 7,721,764,232.64/121,356.80
  6. Step 6: Final answer
    x = 63,628.61

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