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Finding the Fourth Proportional to 69,610.40, 104,415.60 and 40,119.20

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Solution

The fourth proportional to 69,610.40, 104,415.60 and 40,119.20 is: 60,178.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,610.40 : 104,415.60 = 40,119.20 : x
  2. Step 2: Convert to fraction form
    69,610.40/104,415.60 = 40,119.20/x
  3. Step 3: Cross multiply
    69,610.40x = 104,415.60 × 40,119.20
  4. Step 4: Simplify right side
    69,610.40x = 4,189,070,339.52
  5. Step 5: Solve for x
    x = 4,189,070,339.52/69,610.40
  6. Step 6: Final answer
    x = 60,178.80

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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.