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Finding the Fourth Proportional to 68,139.40, 102,209.10 and 60,622.60

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Solution

The fourth proportional to 68,139.40, 102,209.10 and 60,622.60 is: 90,933.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,139.40 : 102,209.10 = 60,622.60 : x
  2. Step 2: Convert to fraction form
    68,139.40/102,209.10 = 60,622.60/x
  3. Step 3: Cross multiply
    68,139.40x = 102,209.10 × 60,622.60
  4. Step 4: Simplify right side
    68,139.40x = 6,196,181,385.66
  5. Step 5: Solve for x
    x = 6,196,181,385.66/68,139.40
  6. Step 6: Final answer
    x = 90,933.90

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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.