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Finding the Fourth Proportional to 243,255.20, 335,638.20 and 141,221.92

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Solution

The fourth proportional to 243,255.20, 335,638.20 and 141,221.92 is: 194,854.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,255.20 : 335,638.20 = 141,221.92 : x
  2. Step 2: Convert to fraction form
    243,255.20/335,638.20 = 141,221.92/x
  3. Step 3: Cross multiply
    243,255.20x = 335,638.20 × 141,221.92
  4. Step 4: Simplify right side
    243,255.20x = 47,399,471,029.34
  5. Step 5: Solve for x
    x = 47,399,471,029.34/243,255.20
  6. Step 6: Final answer
    x = 194,854.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.