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Finding the Fourth Proportional to 208,609.79, 287,865.77 and 117,974.25

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Solution

The fourth proportional to 208,609.79, 287,865.77 and 117,974.25 is: 162,795.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,609.79 : 287,865.77 = 117,974.25 : x
  2. Step 2: Convert to fraction form
    208,609.79/287,865.77 = 117,974.25/x
  3. Step 3: Cross multiply
    208,609.79x = 287,865.77 × 117,974.25
  4. Step 4: Simplify right side
    208,609.79x = 33,960,747,726.55
  5. Step 5: Solve for x
    x = 33,960,747,726.55/208,609.79
  6. Step 6: Final answer
    x = 162,795.56

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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.