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Finding the Fourth Proportional to 68,356.20, 102,534.30 and 65,731.80

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Solution

The fourth proportional to 68,356.20, 102,534.30 and 65,731.80 is: 98,597.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,356.20 : 102,534.30 = 65,731.80 : x
  2. Step 2: Convert to fraction form
    68,356.20/102,534.30 = 65,731.80/x
  3. Step 3: Cross multiply
    68,356.20x = 102,534.30 × 65,731.80
  4. Step 4: Simplify right side
    68,356.20x = 6,739,764,100.74
  5. Step 5: Solve for x
    x = 6,739,764,100.74/68,356.20
  6. Step 6: Final answer
    x = 98,597.70

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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.