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Finding the Fourth Proportional to 215,186.80, 322,780.20 and 109,970.80

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Solution

The fourth proportional to 215,186.80, 322,780.20 and 109,970.80 is: 164,956.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,186.80 : 322,780.20 = 109,970.80 : x
  2. Step 2: Convert to fraction form
    215,186.80/322,780.20 = 109,970.80/x
  3. Step 3: Cross multiply
    215,186.80x = 322,780.20 × 109,970.80
  4. Step 4: Simplify right side
    215,186.80x = 35,496,396,818.16
  5. Step 5: Solve for x
    x = 35,496,396,818.16/215,186.80
  6. Step 6: Final answer
    x = 164,956.20

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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.