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Finding the Fourth Proportional to 69,113.72, 103,665.64 and 26,985.91

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Solution

The fourth proportional to 69,113.72, 103,665.64 and 26,985.91 is: 40,476.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,113.72 : 103,665.64 = 26,985.91 : x
  2. Step 2: Convert to fraction form
    69,113.72/103,665.64 = 26,985.91/x
  3. Step 3: Cross multiply
    69,113.72x = 103,665.64 × 26,985.91
  4. Step 4: Simplify right side
    69,113.72x = 2,797,511,631.13
  5. Step 5: Solve for x
    x = 2,797,511,631.13/69,113.72
  6. Step 6: Final answer
    x = 40,476.94

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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.