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Finding the Fourth Proportional to 43,979.69, 65,920.03 and 21,808.98

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Solution

The fourth proportional to 43,979.69, 65,920.03 and 21,808.98 is: 32,688.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,979.69 : 65,920.03 = 21,808.98 : x
  2. Step 2: Convert to fraction form
    43,979.69/65,920.03 = 21,808.98/x
  3. Step 3: Cross multiply
    43,979.69x = 65,920.03 × 21,808.98
  4. Step 4: Simplify right side
    43,979.69x = 1,437,648,561.35
  5. Step 5: Solve for x
    x = 1,437,648,561.35/43,979.69
  6. Step 6: Final answer
    x = 32,688.92

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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.