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Finding the Fourth Proportional to 208,118.48, 287,216.48 and 117,489.80

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Solution

The fourth proportional to 208,118.48, 287,216.48 and 117,489.80 is: 162,143.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,118.48 : 287,216.48 = 117,489.80 : x
  2. Step 2: Convert to fraction form
    208,118.48/287,216.48 = 117,489.80/x
  3. Step 3: Cross multiply
    208,118.48x = 287,216.48 × 117,489.80
  4. Step 4: Simplify right side
    208,118.48x = 33,745,006,791.90
  5. Step 5: Solve for x
    x = 33,745,006,791.90/208,118.48
  6. Step 6: Final answer
    x = 162,143.25

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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.