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Finding the Fourth Proportional to 68,559.20, 102,685.20 and 40,911.20

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Solution

The fourth proportional to 68,559.20, 102,685.20 and 40,911.20 is: 61,275.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,559.20 : 102,685.20 = 40,911.20 : x
  2. Step 2: Convert to fraction form
    68,559.20/102,685.20 = 40,911.20/x
  3. Step 3: Cross multiply
    68,559.20x = 102,685.20 × 40,911.20
  4. Step 4: Simplify right side
    68,559.20x = 4,200,974,754.24
  5. Step 5: Solve for x
    x = 4,200,974,754.24/68,559.20
  6. Step 6: Final answer
    x = 61,275.14

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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.