Home / 215,816.40-323,724.60-120,949.20

Finding the Fourth Proportional to 215,816.40, 323,724.60 and 120,949.20

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Solution

The fourth proportional to 215,816.40, 323,724.60 and 120,949.20 is: 181,423.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,816.40 : 323,724.60 = 120,949.20 : x
  2. Step 2: Convert to fraction form
    215,816.40/323,724.60 = 120,949.20/x
  3. Step 3: Cross multiply
    215,816.40x = 323,724.60 × 120,949.20
  4. Step 4: Simplify right side
    215,816.40x = 39,154,231,390.32
  5. Step 5: Solve for x
    x = 39,154,231,390.32/215,816.40
  6. Step 6: Final answer
    x = 181,423.80

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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.