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Finding the Fourth Proportional to 221,171.76, 305,216.82 and 120,569.76

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Solution

The fourth proportional to 221,171.76, 305,216.82 and 120,569.76 is: 166,386.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,171.76 : 305,216.82 = 120,569.76 : x
  2. Step 2: Convert to fraction form
    221,171.76/305,216.82 = 120,569.76/x
  3. Step 3: Cross multiply
    221,171.76x = 305,216.82 × 120,569.76
  4. Step 4: Simplify right side
    221,171.76x = 36,799,918,735.36
  5. Step 5: Solve for x
    x = 36,799,918,735.36/221,171.76
  6. Step 6: Final answer
    x = 166,386.15

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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.