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Finding the Fourth Proportional to 72,906.13, 100,556.13 and 64,739.62

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Solution

The fourth proportional to 72,906.13, 100,556.13 and 64,739.62 is: 89,292.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,906.13 : 100,556.13 = 64,739.62 : x
  2. Step 2: Convert to fraction form
    72,906.13/100,556.13 = 64,739.62/x
  3. Step 3: Cross multiply
    72,906.13x = 100,556.13 × 64,739.62
  4. Step 4: Simplify right side
    72,906.13x = 6,509,965,644.87
  5. Step 5: Solve for x
    x = 6,509,965,644.87/72,906.13
  6. Step 6: Final answer
    x = 89,292.43

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1.5x scale

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.