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Finding the Fourth Proportional to 268,163.52, 402,264.48 and 81,189.60

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Solution

The fourth proportional to 268,163.52, 402,264.48 and 81,189.60 is: 121,790.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,163.52 : 402,264.48 = 81,189.60 : x
  2. Step 2: Convert to fraction form
    268,163.52/402,264.48 = 81,189.60/x
  3. Step 3: Cross multiply
    268,163.52x = 402,264.48 × 81,189.60
  4. Step 4: Simplify right side
    268,163.52x = 32,659,692,225.41
  5. Step 5: Solve for x
    x = 32,659,692,225.41/268,163.52
  6. Step 6: Final answer
    x = 121,790.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.