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Finding the Fourth Proportional to 154,872, 213,690.42 and 91,186.56

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Solution

The fourth proportional to 154,872, 213,690.42 and 91,186.56 is: 125,818.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,872 : 213,690.42 = 91,186.56 : x
  2. Step 2: Convert to fraction form
    154,872/213,690.42 = 91,186.56/x
  3. Step 3: Cross multiply
    154,872x = 213,690.42 × 91,186.56
  4. Step 4: Simplify right side
    154,872x = 19,485,694,304.76
  5. Step 5: Solve for x
    x = 19,485,694,304.76/154,872
  6. Step 6: Final answer
    x = 125,818.06

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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.