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Finding the Fourth Proportional to 208,587.75, 312,891.36 and 60,843.75

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Solution

The fourth proportional to 208,587.75, 312,891.36 and 60,843.75 is: 91,268.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,587.75 : 312,891.36 = 60,843.75 : x
  2. Step 2: Convert to fraction form
    208,587.75/312,891.36 = 60,843.75/x
  3. Step 3: Cross multiply
    208,587.75x = 312,891.36 × 60,843.75
  4. Step 4: Simplify right side
    208,587.75x = 19,037,483,685
  5. Step 5: Solve for x
    x = 19,037,483,685/208,587.75
  6. Step 6: Final answer
    x = 91,268.46

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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.