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Finding the Fourth Proportional to 68,358.62, 102,561.53 and 28,399.07

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Solution

The fourth proportional to 68,358.62, 102,561.53 and 28,399.07 is: 42,608.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,358.62 : 102,561.53 = 28,399.07 : x
  2. Step 2: Convert to fraction form
    68,358.62/102,561.53 = 28,399.07/x
  3. Step 3: Cross multiply
    68,358.62x = 102,561.53 × 28,399.07
  4. Step 4: Simplify right side
    68,358.62x = 2,912,652,184.19
  5. Step 5: Solve for x
    x = 2,912,652,184.19/68,358.62
  6. Step 6: Final answer
    x = 42,608.41

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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.