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Finding the Fourth Proportional to 100,043.55, 150,009.91 and 40,920.73

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Solution

The fourth proportional to 100,043.55, 150,009.91 and 40,920.73 is: 61,358.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,043.55 : 150,009.91 = 40,920.73 : x
  2. Step 2: Convert to fraction form
    100,043.55/150,009.91 = 40,920.73/x
  3. Step 3: Cross multiply
    100,043.55x = 150,009.91 × 40,920.73
  4. Step 4: Simplify right side
    100,043.55x = 6,138,515,024.43
  5. Step 5: Solve for x
    x = 6,138,515,024.43/100,043.55
  6. Step 6: Final answer
    x = 61,358.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.