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Finding the Fourth Proportional to 225,619.12, 311,354.42 and 123,643.64

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Solution

The fourth proportional to 225,619.12, 311,354.42 and 123,643.64 is: 170,628.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,619.12 : 311,354.42 = 123,643.64 : x
  2. Step 2: Convert to fraction form
    225,619.12/311,354.42 = 123,643.64/x
  3. Step 3: Cross multiply
    225,619.12x = 311,354.42 × 123,643.64
  4. Step 4: Simplify right side
    225,619.12x = 38,496,993,624.99
  5. Step 5: Solve for x
    x = 38,496,993,624.99/225,619.12
  6. Step 6: Final answer
    x = 170,628.24

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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.