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Finding the Fourth Proportional to 154,232.87, 212,839.90 and 86,249.07

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Solution

The fourth proportional to 154,232.87, 212,839.90 and 86,249.07 is: 119,022.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,232.87 : 212,839.90 = 86,249.07 : x
  2. Step 2: Convert to fraction form
    154,232.87/212,839.90 = 86,249.07/x
  3. Step 3: Cross multiply
    154,232.87x = 212,839.90 × 86,249.07
  4. Step 4: Simplify right side
    154,232.87x = 18,357,243,218.27
  5. Step 5: Solve for x
    x = 18,357,243,218.27/154,232.87
  6. Step 6: Final answer
    x = 119,022.90

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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.