Home / 221,388.80-331,718.40-127,731.20

Finding the Fourth Proportional to 221,388.80, 331,718.40 and 127,731.20

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Solution

The fourth proportional to 221,388.80, 331,718.40 and 127,731.20 is: 191,386.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,388.80 : 331,718.40 = 127,731.20 : x
  2. Step 2: Convert to fraction form
    221,388.80/331,718.40 = 127,731.20/x
  3. Step 3: Cross multiply
    221,388.80x = 331,718.40 × 127,731.20
  4. Step 4: Simplify right side
    221,388.80x = 42,370,789,294.08
  5. Step 5: Solve for x
    x = 42,370,789,294.08/221,388.80
  6. Step 6: Final answer
    x = 191,386.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.