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Finding the Fourth Proportional to 43,681.88, 65,516.42 and 21,489.32

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Solution

The fourth proportional to 43,681.88, 65,516.42 and 21,489.32 is: 32,230.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,681.88 : 65,516.42 = 21,489.32 : x
  2. Step 2: Convert to fraction form
    43,681.88/65,516.42 = 21,489.32/x
  3. Step 3: Cross multiply
    43,681.88x = 65,516.42 × 21,489.32
  4. Step 4: Simplify right side
    43,681.88x = 1,407,903,314.63
  5. Step 5: Solve for x
    x = 1,407,903,314.63/43,681.88
  6. Step 6: Final answer
    x = 32,230.83

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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.