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Finding the Fourth Proportional to 208,338.18, 287,491.78 and 122,300.69

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Solution

The fourth proportional to 208,338.18, 287,491.78 and 122,300.69 is: 168,766.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,338.18 : 287,491.78 = 122,300.69 : x
  2. Step 2: Convert to fraction form
    208,338.18/287,491.78 = 122,300.69/x
  3. Step 3: Cross multiply
    208,338.18x = 287,491.78 × 122,300.69
  4. Step 4: Simplify right side
    208,338.18x = 35,160,441,778.75
  5. Step 5: Solve for x
    x = 35,160,441,778.75/208,338.18
  6. Step 6: Final answer
    x = 168,766.20

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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.