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Finding the Fourth Proportional to 69,109.72, 103,659.64 and 26,981.91

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Solution

The fourth proportional to 69,109.72, 103,659.64 and 26,981.91 is: 40,470.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,109.72 : 103,659.64 = 26,981.91 : x
  2. Step 2: Convert to fraction form
    69,109.72/103,659.64 = 26,981.91/x
  3. Step 3: Cross multiply
    69,109.72x = 103,659.64 × 26,981.91
  4. Step 4: Simplify right side
    69,109.72x = 2,796,935,077.11
  5. Step 5: Solve for x
    x = 2,796,935,077.11/69,109.72
  6. Step 6: Final answer
    x = 40,470.94

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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.