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Finding the Fourth Proportional to 218,634.84, 301,791.56 and 128,019.96

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Solution

The fourth proportional to 218,634.84, 301,791.56 and 128,019.96 is: 176,711.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,634.84 : 301,791.56 = 128,019.96 : x
  2. Step 2: Convert to fraction form
    218,634.84/301,791.56 = 128,019.96/x
  3. Step 3: Cross multiply
    218,634.84x = 301,791.56 × 128,019.96
  4. Step 4: Simplify right side
    218,634.84x = 38,635,342,799.44
  5. Step 5: Solve for x
    x = 38,635,342,799.44/218,634.84
  6. Step 6: Final answer
    x = 176,711.74

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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.