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Finding the Fourth Proportional to 53,742.20, 80,613.30 and 20,910.20

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Solution

The fourth proportional to 53,742.20, 80,613.30 and 20,910.20 is: 31,365.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,742.20 : 80,613.30 = 20,910.20 : x
  2. Step 2: Convert to fraction form
    53,742.20/80,613.30 = 20,910.20/x
  3. Step 3: Cross multiply
    53,742.20x = 80,613.30 × 20,910.20
  4. Step 4: Simplify right side
    53,742.20x = 1,685,640,225.66
  5. Step 5: Solve for x
    x = 1,685,640,225.66/53,742.20
  6. Step 6: Final answer
    x = 31,365.30

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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.