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Finding the Fourth Proportional to 225,497.70, 311,191.85 and 128,699.62

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Solution

The fourth proportional to 225,497.70, 311,191.85 and 128,699.62 is: 177,608.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,497.70 : 311,191.85 = 128,699.62 : x
  2. Step 2: Convert to fraction form
    225,497.70/311,191.85 = 128,699.62/x
  3. Step 3: Cross multiply
    225,497.70x = 311,191.85 × 128,699.62
  4. Step 4: Simplify right side
    225,497.70x = 40,050,272,385.87
  5. Step 5: Solve for x
    x = 40,050,272,385.87/225,497.70
  6. Step 6: Final answer
    x = 177,608.34

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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.