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Finding the Fourth Proportional to 220,505.95, 304,320.81 and 129,890.44

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Solution

The fourth proportional to 220,505.95, 304,320.81 and 129,890.44 is: 179,262.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,505.95 : 304,320.81 = 129,890.44 : x
  2. Step 2: Convert to fraction form
    220,505.95/304,320.81 = 129,890.44/x
  3. Step 3: Cross multiply
    220,505.95x = 304,320.81 × 129,890.44
  4. Step 4: Simplify right side
    220,505.95x = 39,528,363,912.06
  5. Step 5: Solve for x
    x = 39,528,363,912.06/220,505.95
  6. Step 6: Final answer
    x = 179,262.12

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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.