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Finding the Fourth Proportional to 215,612.40, 322,981.20 and 122,008.80

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Solution

The fourth proportional to 215,612.40, 322,981.20 and 122,008.80 is: 182,765.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,612.40 : 322,981.20 = 122,008.80 : x
  2. Step 2: Convert to fraction form
    215,612.40/322,981.20 = 122,008.80/x
  3. Step 3: Cross multiply
    215,612.40x = 322,981.20 × 122,008.80
  4. Step 4: Simplify right side
    215,612.40x = 39,406,548,634.56
  5. Step 5: Solve for x
    x = 39,406,548,634.56/215,612.40
  6. Step 6: Final answer
    x = 182,765.69

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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.