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Finding the Fourth Proportional to 79,887.96, 119,843.28 and 42,438.24

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Solution

The fourth proportional to 79,887.96, 119,843.28 and 42,438.24 is: 63,663.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,887.96 : 119,843.28 = 42,438.24 : x
  2. Step 2: Convert to fraction form
    79,887.96/119,843.28 = 42,438.24/x
  3. Step 3: Cross multiply
    79,887.96x = 119,843.28 × 42,438.24
  4. Step 4: Simplify right side
    79,887.96x = 5,085,937,879.03
  5. Step 5: Solve for x
    x = 5,085,937,879.03/79,887.96
  6. Step 6: Final answer
    x = 63,663.38

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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.