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Finding the Fourth Proportional to 208,214.25, 287,335.71 and 112,721.73

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Solution

The fourth proportional to 208,214.25, 287,335.71 and 112,721.73 is: 155,556.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,214.25 : 287,335.71 = 112,721.73 : x
  2. Step 2: Convert to fraction form
    208,214.25/287,335.71 = 112,721.73/x
  3. Step 3: Cross multiply
    208,214.25x = 287,335.71 × 112,721.73
  4. Step 4: Simplify right side
    208,214.25x = 32,388,978,321.98
  5. Step 5: Solve for x
    x = 32,388,978,321.98/208,214.25
  6. Step 6: Final answer
    x = 155,556.01

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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.