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Finding the Fourth Proportional to 220,987.89, 304,963.26 and 120,385.89

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Solution

The fourth proportional to 220,987.89, 304,963.26 and 120,385.89 is: 166,132.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,987.89 : 304,963.26 = 120,385.89 : x
  2. Step 2: Convert to fraction form
    220,987.89/304,963.26 = 120,385.89/x
  3. Step 3: Cross multiply
    220,987.89x = 304,963.26 × 120,385.89
  4. Step 4: Simplify right side
    220,987.89x = 36,713,273,472.40
  5. Step 5: Solve for x
    x = 36,713,273,472.40/220,987.89
  6. Step 6: Final answer
    x = 166,132.51

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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.