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Finding the Fourth Proportional to 207,281.70, 311,104.80 and 122,936.40

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Solution

The fourth proportional to 207,281.70, 311,104.80 and 122,936.40 is: 184,512.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,281.70 : 311,104.80 = 122,936.40 : x
  2. Step 2: Convert to fraction form
    207,281.70/311,104.80 = 122,936.40/x
  3. Step 3: Cross multiply
    207,281.70x = 311,104.80 × 122,936.40
  4. Step 4: Simplify right side
    207,281.70x = 38,246,104,134.72
  5. Step 5: Solve for x
    x = 38,246,104,134.72/207,281.70
  6. Step 6: Final answer
    x = 184,512.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.