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Finding the Fourth Proportional to 220,920.75, 304,870.65 and 120,318.75

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Solution

The fourth proportional to 220,920.75, 304,870.65 and 120,318.75 is: 166,039.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,920.75 : 304,870.65 = 120,318.75 : x
  2. Step 2: Convert to fraction form
    220,920.75/304,870.65 = 120,318.75/x
  3. Step 3: Cross multiply
    220,920.75x = 304,870.65 × 120,318.75
  4. Step 4: Simplify right side
    220,920.75x = 36,681,655,519.69
  5. Step 5: Solve for x
    x = 36,681,655,519.69/220,920.75
  6. Step 6: Final answer
    x = 166,039.88

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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.