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Finding the Fourth Proportional to 69,135.72, 103,621.56 and 61,164.10

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Solution

The fourth proportional to 69,135.72, 103,621.56 and 61,164.10 is: 91,673.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,135.72 : 103,621.56 = 61,164.10 : x
  2. Step 2: Convert to fraction form
    69,135.72/103,621.56 = 61,164.10/x
  3. Step 3: Cross multiply
    69,135.72x = 103,621.56 × 61,164.10
  4. Step 4: Simplify right side
    69,135.72x = 6,337,919,458.00
  5. Step 5: Solve for x
    x = 6,337,919,458.00/69,135.72
  6. Step 6: Final answer
    x = 91,673.59

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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.