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Finding the Fourth Proportional to 53,439.80, 80,166.90 and 18,390.20

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Solution

The fourth proportional to 53,439.80, 80,166.90 and 18,390.20 is: 27,587.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,439.80 : 80,166.90 = 18,390.20 : x
  2. Step 2: Convert to fraction form
    53,439.80/80,166.90 = 18,390.20/x
  3. Step 3: Cross multiply
    53,439.80x = 80,166.90 × 18,390.20
  4. Step 4: Simplify right side
    53,439.80x = 1,474,285,324.38
  5. Step 5: Solve for x
    x = 1,474,285,324.38/53,439.80
  6. Step 6: Final answer
    x = 27,587.78

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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.