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Finding the Fourth Proportional to 221,045.55, 305,042.85 and 120,443.55

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Solution

The fourth proportional to 221,045.55, 305,042.85 and 120,443.55 is: 166,212.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,045.55 : 305,042.85 = 120,443.55 : x
  2. Step 2: Convert to fraction form
    221,045.55/305,042.85 = 120,443.55/x
  3. Step 3: Cross multiply
    221,045.55x = 305,042.85 × 120,443.55
  4. Step 4: Simplify right side
    221,045.55x = 36,740,443,756.12
  5. Step 5: Solve for x
    x = 36,740,443,756.12/221,045.55
  6. Step 6: Final answer
    x = 166,212.09

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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.