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Finding the Fourth Proportional to 65,510.20, 98,265.30 and 21,138.40

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Solution

The fourth proportional to 65,510.20, 98,265.30 and 21,138.40 is: 31,707.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,510.20 : 98,265.30 = 21,138.40 : x
  2. Step 2: Convert to fraction form
    65,510.20/98,265.30 = 21,138.40/x
  3. Step 3: Cross multiply
    65,510.20x = 98,265.30 × 21,138.40
  4. Step 4: Simplify right side
    65,510.20x = 2,077,171,217.52
  5. Step 5: Solve for x
    x = 2,077,171,217.52/65,510.20
  6. Step 6: Final answer
    x = 31,707.60

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