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Finding the Fourth Proportional to 43,344.74, 64,974.80 and 21,157.22

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Solution

The fourth proportional to 43,344.74, 64,974.80 and 21,157.22 is: 31,715.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,344.74 : 64,974.80 = 21,157.22 : x
  2. Step 2: Convert to fraction form
    43,344.74/64,974.80 = 21,157.22/x
  3. Step 3: Cross multiply
    43,344.74x = 64,974.80 × 21,157.22
  4. Step 4: Simplify right side
    43,344.74x = 1,374,686,138.06
  5. Step 5: Solve for x
    x = 1,374,686,138.06/43,344.74
  6. Step 6: Final answer
    x = 31,715.18

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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.