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Finding the Fourth Proportional to 215,882.58, 297,911.39 and 120,405.45

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Solution

The fourth proportional to 215,882.58, 297,911.39 and 120,405.45 is: 166,155.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,882.58 : 297,911.39 = 120,405.45 : x
  2. Step 2: Convert to fraction form
    215,882.58/297,911.39 = 120,405.45/x
  3. Step 3: Cross multiply
    215,882.58x = 297,911.39 × 120,405.45
  4. Step 4: Simplify right side
    215,882.58x = 35,870,154,973.08
  5. Step 5: Solve for x
    x = 35,870,154,973.08/215,882.58
  6. Step 6: Final answer
    x = 166,155.86

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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.