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Finding the Fourth Proportional to 53,363.68, 80,040.15 and 13,920.86

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Solution

The fourth proportional to 53,363.68, 80,040.15 and 13,920.86 is: 20,879.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,363.68 : 80,040.15 = 13,920.86 : x
  2. Step 2: Convert to fraction form
    53,363.68/80,040.15 = 13,920.86/x
  3. Step 3: Cross multiply
    53,363.68x = 80,040.15 × 13,920.86
  4. Step 4: Simplify right side
    53,363.68x = 1,114,227,922.63
  5. Step 5: Solve for x
    x = 1,114,227,922.63/53,363.68
  6. Step 6: Final answer
    x = 20,879.89

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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.