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Finding the Fourth Proportional to 221,495.56, 305,667.06 and 120,891.40

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Solution

The fourth proportional to 221,495.56, 305,667.06 and 120,891.40 is: 166,831.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,495.56 : 305,667.06 = 120,891.40 : x
  2. Step 2: Convert to fraction form
    221,495.56/305,667.06 = 120,891.40/x
  3. Step 3: Cross multiply
    221,495.56x = 305,667.06 × 120,891.40
  4. Step 4: Simplify right side
    221,495.56x = 36,952,518,817.28
  5. Step 5: Solve for x
    x = 36,952,518,817.28/221,495.56
  6. Step 6: Final answer
    x = 166,831.87

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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.