Home / 221,013.26-304,999.54-129,137.94

Finding the Fourth Proportional to 221,013.26, 304,999.54 and 129,137.94

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Solution

The fourth proportional to 221,013.26, 304,999.54 and 129,137.94 is: 178,211.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,013.26 : 304,999.54 = 129,137.94 : x
  2. Step 2: Convert to fraction form
    221,013.26/304,999.54 = 129,137.94/x
  3. Step 3: Cross multiply
    221,013.26x = 304,999.54 × 129,137.94
  4. Step 4: Simplify right side
    221,013.26x = 39,387,012,296.55
  5. Step 5: Solve for x
    x = 39,387,012,296.55/221,013.26
  6. Step 6: Final answer
    x = 178,211.08

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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.