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Finding the Fourth Proportional to 68,548.20, 102,841.98 and 28,559.40

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Solution

The fourth proportional to 68,548.20, 102,841.98 and 28,559.40 is: 42,847.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,548.20 : 102,841.98 = 28,559.40 : x
  2. Step 2: Convert to fraction form
    68,548.20/102,841.98 = 28,559.40/x
  3. Step 3: Cross multiply
    68,548.20x = 102,841.98 × 28,559.40
  4. Step 4: Simplify right side
    68,548.20x = 2,937,105,243.61
  5. Step 5: Solve for x
    x = 2,937,105,243.61/68,548.20
  6. Step 6: Final answer
    x = 42,847.30

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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.