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Finding the Fourth Proportional to 72,144.80, 99,590.48 and 43,859.52

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Solution

The fourth proportional to 72,144.80, 99,590.48 and 43,859.52 is: 60,544.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,144.80 : 99,590.48 = 43,859.52 : x
  2. Step 2: Convert to fraction form
    72,144.80/99,590.48 = 43,859.52/x
  3. Step 3: Cross multiply
    72,144.80x = 99,590.48 × 43,859.52
  4. Step 4: Simplify right side
    72,144.80x = 4,367,990,649.37
  5. Step 5: Solve for x
    x = 4,367,990,649.37/72,144.80
  6. Step 6: Final answer
    x = 60,544.77

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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.