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Finding the Fourth Proportional to 73,965.60, 110,967.84 and 21,379.36

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Solution

The fourth proportional to 73,965.60, 110,967.84 and 21,379.36 is: 32,074.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,965.60 : 110,967.84 = 21,379.36 : x
  2. Step 2: Convert to fraction form
    73,965.60/110,967.84 = 21,379.36/x
  3. Step 3: Cross multiply
    73,965.60x = 110,967.84 × 21,379.36
  4. Step 4: Simplify right side
    73,965.60x = 2,372,421,399.78
  5. Step 5: Solve for x
    x = 2,372,421,399.78/73,965.60
  6. Step 6: Final answer
    x = 32,074.66

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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.