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Finding the Fourth Proportional to 220,689, 304,550.82 and 120,087.72

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Solution

The fourth proportional to 220,689, 304,550.82 and 120,087.72 is: 165,721.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,689 : 304,550.82 = 120,087.72 : x
  2. Step 2: Convert to fraction form
    220,689/304,550.82 = 120,087.72/x
  3. Step 3: Cross multiply
    220,689x = 304,550.82 × 120,087.72
  4. Step 4: Simplify right side
    220,689x = 36,572,813,597.93
  5. Step 5: Solve for x
    x = 36,572,813,597.93/220,689
  6. Step 6: Final answer
    x = 165,721.05

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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.