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Finding the Fourth Proportional to 100,615.91, 138,843.25 and 55,292.92

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Solution

The fourth proportional to 100,615.91, 138,843.25 and 55,292.92 is: 76,300.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,615.91 : 138,843.25 = 55,292.92 : x
  2. Step 2: Convert to fraction form
    100,615.91/138,843.25 = 55,292.92/x
  3. Step 3: Cross multiply
    100,615.91x = 138,843.25 × 55,292.92
  4. Step 4: Simplify right side
    100,615.91x = 7,677,048,438.33
  5. Step 5: Solve for x
    x = 7,677,048,438.33/100,615.91
  6. Step 6: Final answer
    x = 76,300.54

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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.