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Finding the Fourth Proportional to 72,424.26, 99,905.07 and 45,556.86

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Solution

The fourth proportional to 72,424.26, 99,905.07 and 45,556.86 is: 62,843.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,424.26 : 99,905.07 = 45,556.86 : x
  2. Step 2: Convert to fraction form
    72,424.26/99,905.07 = 45,556.86/x
  3. Step 3: Cross multiply
    72,424.26x = 99,905.07 × 45,556.86
  4. Step 4: Simplify right side
    72,424.26x = 4,551,361,287.28
  5. Step 5: Solve for x
    x = 4,551,361,287.28/72,424.26
  6. Step 6: Final answer
    x = 62,843.05

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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.