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Finding the Fourth Proportional to 73,868.34, 110,802.90 and 21,279.08

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Solution

The fourth proportional to 73,868.34, 110,802.90 and 21,279.08 is: 31,918.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,868.34 : 110,802.90 = 21,279.08 : x
  2. Step 2: Convert to fraction form
    73,868.34/110,802.90 = 21,279.08/x
  3. Step 3: Cross multiply
    73,868.34x = 110,802.90 × 21,279.08
  4. Step 4: Simplify right side
    73,868.34x = 2,357,783,773.33
  5. Step 5: Solve for x
    x = 2,357,783,773.33/73,868.34
  6. Step 6: Final answer
    x = 31,918.73

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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.