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Finding the Fourth Proportional to 225,689.67, 311,449.59 and 123,720.75

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Solution

The fourth proportional to 225,689.67, 311,449.59 and 123,720.75 is: 170,733.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,689.67 : 311,449.59 = 123,720.75 : x
  2. Step 2: Convert to fraction form
    225,689.67/311,449.59 = 123,720.75/x
  3. Step 3: Cross multiply
    225,689.67x = 311,449.59 × 123,720.75
  4. Step 4: Simplify right side
    225,689.67x = 38,532,776,861.99
  5. Step 5: Solve for x
    x = 38,532,776,861.99/225,689.67
  6. Step 6: Final answer
    x = 170,733.45

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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.