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Finding the Fourth Proportional to 53,813.20, 80,719.80 and 42,136.40

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Solution

The fourth proportional to 53,813.20, 80,719.80 and 42,136.40 is: 63,204.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,813.20 : 80,719.80 = 42,136.40 : x
  2. Step 2: Convert to fraction form
    53,813.20/80,719.80 = 42,136.40/x
  3. Step 3: Cross multiply
    53,813.20x = 80,719.80 × 42,136.40
  4. Step 4: Simplify right side
    53,813.20x = 3,401,241,780.72
  5. Step 5: Solve for x
    x = 3,401,241,780.72/53,813.20
  6. Step 6: Final answer
    x = 63,204.60

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