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Finding the Fourth Proportional to 73,699.70, 110,549.10 and 21,109.28

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Solution

The fourth proportional to 73,699.70, 110,549.10 and 21,109.28 is: 31,663.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,699.70 : 110,549.10 = 21,109.28 : x
  2. Step 2: Convert to fraction form
    73,699.70/110,549.10 = 21,109.28/x
  3. Step 3: Cross multiply
    73,699.70x = 110,549.10 × 21,109.28
  4. Step 4: Simplify right side
    73,699.70x = 2,333,611,905.65
  5. Step 5: Solve for x
    x = 2,333,611,905.65/73,699.70
  6. Step 6: Final answer
    x = 31,663.79

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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.