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Finding the Fourth Proportional to 225,687.30, 311,439.12 and 134,989.68

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Solution

The fourth proportional to 225,687.30, 311,439.12 and 134,989.68 is: 186,280.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,687.30 : 311,439.12 = 134,989.68 : x
  2. Step 2: Convert to fraction form
    225,687.30/311,439.12 = 134,989.68/x
  3. Step 3: Cross multiply
    225,687.30x = 311,439.12 × 134,989.68
  4. Step 4: Simplify right side
    225,687.30x = 42,041,067,148.28
  5. Step 5: Solve for x
    x = 42,041,067,148.28/225,687.30
  6. Step 6: Final answer
    x = 186,280.16

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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.