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Finding the Fourth Proportional to 105,728.91, 145,904.54 and 60,406.55

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Solution

The fourth proportional to 105,728.91, 145,904.54 and 60,406.55 is: 83,360.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,728.91 : 145,904.54 = 60,406.55 : x
  2. Step 2: Convert to fraction form
    105,728.91/145,904.54 = 60,406.55/x
  3. Step 3: Cross multiply
    105,728.91x = 145,904.54 × 60,406.55
  4. Step 4: Simplify right side
    105,728.91x = 8,813,588,859.18
  5. Step 5: Solve for x
    x = 8,813,588,859.18/105,728.91
  6. Step 6: Final answer
    x = 83,360.25

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