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Finding the Fourth Proportional to 208,771.98, 312,878.79 and 108,722.13

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Solution

The fourth proportional to 208,771.98, 312,878.79 and 108,722.13 is: 162,937.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,771.98 : 312,878.79 = 108,722.13 : x
  2. Step 2: Convert to fraction form
    208,771.98/312,878.79 = 108,722.13/x
  3. Step 3: Cross multiply
    208,771.98x = 312,878.79 × 108,722.13
  4. Step 4: Simplify right side
    208,771.98x = 34,016,848,480.62
  5. Step 5: Solve for x
    x = 34,016,848,480.62/208,771.98
  6. Step 6: Final answer
    x = 162,937.81

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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.