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Finding the Fourth Proportional to 220,385, 304,131.30 and 130,961

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Solution

The fourth proportional to 220,385, 304,131.30 and 130,961 is: 180,726.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,385 : 304,131.30 = 130,961 : x
  2. Step 2: Convert to fraction form
    220,385/304,131.30 = 130,961/x
  3. Step 3: Cross multiply
    220,385x = 304,131.30 × 130,961
  4. Step 4: Simplify right side
    220,385x = 39,829,339,179.30
  5. Step 5: Solve for x
    x = 39,829,339,179.30/220,385
  6. Step 6: Final answer
    x = 180,726.18

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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.