Home / 223,918.30-309,035.51-128,422.95

Finding the Fourth Proportional to 223,918.30, 309,035.51 and 128,422.95

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Solution

The fourth proportional to 223,918.30, 309,035.51 and 128,422.95 is: 177,239.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,918.30 : 309,035.51 = 128,422.95 : x
  2. Step 2: Convert to fraction form
    223,918.30/309,035.51 = 128,422.95/x
  3. Step 3: Cross multiply
    223,918.30x = 309,035.51 × 128,422.95
  4. Step 4: Simplify right side
    223,918.30x = 39,687,251,848.95
  5. Step 5: Solve for x
    x = 39,687,251,848.95/223,918.30
  6. Step 6: Final answer
    x = 177,239.88

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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.