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Finding the Fourth Proportional to 221,061.92, 305,065.37 and 120,459.92

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Solution

The fourth proportional to 221,061.92, 305,065.37 and 120,459.92 is: 166,234.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,061.92 : 305,065.37 = 120,459.92 : x
  2. Step 2: Convert to fraction form
    221,061.92/305,065.37 = 120,459.92/x
  3. Step 3: Cross multiply
    221,061.92x = 305,065.37 × 120,459.92
  4. Step 4: Simplify right side
    221,061.92x = 36,748,148,840.79
  5. Step 5: Solve for x
    x = 36,748,148,840.79/221,061.92
  6. Step 6: Final answer
    x = 166,234.64

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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.