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Finding the Fourth Proportional to 73,988.64, 110,979.72 and 21,396.96

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Solution

The fourth proportional to 73,988.64, 110,979.72 and 21,396.96 is: 32,094.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,988.64 : 110,979.72 = 21,396.96 : x
  2. Step 2: Convert to fraction form
    73,988.64/110,979.72 = 21,396.96/x
  3. Step 3: Cross multiply
    73,988.64x = 110,979.72 × 21,396.96
  4. Step 4: Simplify right side
    73,988.64x = 2,374,628,629.65
  5. Step 5: Solve for x
    x = 2,374,628,629.65/73,988.64
  6. Step 6: Final answer
    x = 32,094.50

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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.