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Finding the Fourth Proportional to 69,009.94, 103,514.74 and 21,628.66

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Solution

The fourth proportional to 69,009.94, 103,514.74 and 21,628.66 is: 32,442.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,009.94 : 103,514.74 = 21,628.66 : x
  2. Step 2: Convert to fraction form
    69,009.94/103,514.74 = 21,628.66/x
  3. Step 3: Cross multiply
    69,009.94x = 103,514.74 × 21,628.66
  4. Step 4: Simplify right side
    69,009.94x = 2,238,885,116.45
  5. Step 5: Solve for x
    x = 2,238,885,116.45/69,009.94
  6. Step 6: Final answer
    x = 32,442.94

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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.