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Finding the Fourth Proportional to 68,902.20, 103,091.90 and 40,837.32

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Solution

The fourth proportional to 68,902.20, 103,091.90 and 40,837.32 is: 61,101.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,902.20 : 103,091.90 = 40,837.32 : x
  2. Step 2: Convert to fraction form
    68,902.20/103,091.90 = 40,837.32/x
  3. Step 3: Cross multiply
    68,902.20x = 103,091.90 × 40,837.32
  4. Step 4: Simplify right side
    68,902.20x = 4,209,996,909.71
  5. Step 5: Solve for x
    x = 4,209,996,909.71/68,902.20
  6. Step 6: Final answer
    x = 61,101.05

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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.