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Finding the Fourth Proportional to 154,232.74, 212,839.72 and 86,248.94

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Solution

The fourth proportional to 154,232.74, 212,839.72 and 86,248.94 is: 119,022.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,232.74 : 212,839.72 = 86,248.94 : x
  2. Step 2: Convert to fraction form
    154,232.74/212,839.72 = 86,248.94/x
  3. Step 3: Cross multiply
    154,232.74x = 212,839.72 × 86,248.94
  4. Step 4: Simplify right side
    154,232.74x = 18,357,198,960.08
  5. Step 5: Solve for x
    x = 18,357,198,960.08/154,232.74
  6. Step 6: Final answer
    x = 119,022.71

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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.