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Finding the Fourth Proportional to 53,485.84, 80,229.80 and 20,221.56

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Solution

The fourth proportional to 53,485.84, 80,229.80 and 20,221.56 is: 30,332.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,485.84 : 80,229.80 = 20,221.56 : x
  2. Step 2: Convert to fraction form
    53,485.84/80,229.80 = 20,221.56/x
  3. Step 3: Cross multiply
    53,485.84x = 80,229.80 × 20,221.56
  4. Step 4: Simplify right side
    53,485.84x = 1,622,371,714.49
  5. Step 5: Solve for x
    x = 1,622,371,714.49/53,485.84
  6. Step 6: Final answer
    x = 30,332.73

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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.