Home / 208,116.12-312,047.78-81,604.80

Finding the Fourth Proportional to 208,116.12, 312,047.78 and 81,604.80

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Solution

The fourth proportional to 208,116.12, 312,047.78 and 81,604.80 is: 122,357.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,116.12 : 312,047.78 = 81,604.80 : x
  2. Step 2: Convert to fraction form
    208,116.12/312,047.78 = 81,604.80/x
  3. Step 3: Cross multiply
    208,116.12x = 312,047.78 × 81,604.80
  4. Step 4: Simplify right side
    208,116.12x = 25,464,596,269.32
  5. Step 5: Solve for x
    x = 25,464,596,269.32/208,116.12
  6. Step 6: Final answer
    x = 122,357.63

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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.