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Finding the Fourth Proportional to 225,497.56, 311,191.66 and 128,699.47

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Solution

The fourth proportional to 225,497.56, 311,191.66 and 128,699.47 is: 177,608.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,497.56 : 311,191.66 = 128,699.47 : x
  2. Step 2: Convert to fraction form
    225,497.56/311,191.66 = 128,699.47/x
  3. Step 3: Cross multiply
    225,497.56x = 311,191.66 × 128,699.47
  4. Step 4: Simplify right side
    225,497.56x = 40,050,201,066.92
  5. Step 5: Solve for x
    x = 40,050,201,066.92/225,497.56
  6. Step 6: Final answer
    x = 177,608.14

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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.