Home / 221,270.13-305,307.02-129,371.72

Finding the Fourth Proportional to 221,270.13, 305,307.02 and 129,371.72

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Solution

The fourth proportional to 221,270.13, 305,307.02 and 129,371.72 is: 178,506.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,270.13 : 305,307.02 = 129,371.72 : x
  2. Step 2: Convert to fraction form
    221,270.13/305,307.02 = 129,371.72/x
  3. Step 3: Cross multiply
    221,270.13x = 305,307.02 × 129,371.72
  4. Step 4: Simplify right side
    221,270.13x = 39,498,093,102.37
  5. Step 5: Solve for x
    x = 39,498,093,102.37/221,270.13
  6. Step 6: Final answer
    x = 178,506.21

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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.