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Finding the Fourth Proportional to 30,743.16, 42,149.03 and 30,182.75

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Solution

The fourth proportional to 30,743.16, 42,149.03 and 30,182.75 is: 41,380.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,743.16 : 42,149.03 = 30,182.75 : x
  2. Step 2: Convert to fraction form
    30,743.16/42,149.03 = 30,182.75/x
  3. Step 3: Cross multiply
    30,743.16x = 42,149.03 × 30,182.75
  4. Step 4: Simplify right side
    30,743.16x = 1,272,173,273.57
  5. Step 5: Solve for x
    x = 1,272,173,273.57/30,743.16
  6. Step 6: Final answer
    x = 41,380.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.