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Finding the Fourth Proportional to 208,209.72, 311,951.70 and 124,920.12

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Solution

The fourth proportional to 208,209.72, 311,951.70 and 124,920.12 is: 187,162.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,209.72 : 311,951.70 = 124,920.12 : x
  2. Step 2: Convert to fraction form
    208,209.72/311,951.70 = 124,920.12/x
  3. Step 3: Cross multiply
    208,209.72x = 311,951.70 × 124,920.12
  4. Step 4: Simplify right side
    208,209.72x = 38,969,043,798.20
  5. Step 5: Solve for x
    x = 38,969,043,798.20/208,209.72
  6. Step 6: Final answer
    x = 187,162.46

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1.5x scale

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.