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Finding the Fourth Proportional to 220,141.70, 329,775.15 and 120,122.90

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Solution

The fourth proportional to 220,141.70, 329,775.15 and 120,122.90 is: 179,945.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,141.70 : 329,775.15 = 120,122.90 : x
  2. Step 2: Convert to fraction form
    220,141.70/329,775.15 = 120,122.90/x
  3. Step 3: Cross multiply
    220,141.70x = 329,775.15 × 120,122.90
  4. Step 4: Simplify right side
    220,141.70x = 39,613,547,365.94
  5. Step 5: Solve for x
    x = 39,613,547,365.94/220,141.70
  6. Step 6: Final answer
    x = 179,945.68

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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.