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Finding the Fourth Proportional to 71,879.94, 99,191.52 and 40,048.02

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Solution

The fourth proportional to 71,879.94, 99,191.52 and 40,048.02 is: 55,264.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,879.94 : 99,191.52 = 40,048.02 : x
  2. Step 2: Convert to fraction form
    71,879.94/99,191.52 = 40,048.02/x
  3. Step 3: Cross multiply
    71,879.94x = 99,191.52 × 40,048.02
  4. Step 4: Simplify right side
    71,879.94x = 3,972,423,976.79
  5. Step 5: Solve for x
    x = 3,972,423,976.79/71,879.94
  6. Step 6: Final answer
    x = 55,264.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.