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Finding the Fourth Proportional to 43,355.70, 65,045.70 and 21,169.80

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Solution

The fourth proportional to 43,355.70, 65,045.70 and 21,169.80 is: 31,760.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,355.70 : 65,045.70 = 21,169.80 : x
  2. Step 2: Convert to fraction form
    43,355.70/65,045.70 = 21,169.80/x
  3. Step 3: Cross multiply
    43,355.70x = 65,045.70 × 21,169.80
  4. Step 4: Simplify right side
    43,355.70x = 1,377,004,459.86
  5. Step 5: Solve for x
    x = 1,377,004,459.86/43,355.70
  6. Step 6: Final answer
    x = 31,760.63

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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.