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Finding the Fourth Proportional to 208,531.62, 287,775.45 and 113,039.91

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Solution

The fourth proportional to 208,531.62, 287,775.45 and 113,039.91 is: 155,996.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,531.62 : 287,775.45 = 113,039.91 : x
  2. Step 2: Convert to fraction form
    208,531.62/287,775.45 = 113,039.91/x
  3. Step 3: Cross multiply
    208,531.62x = 287,775.45 × 113,039.91
  4. Step 4: Simplify right side
    208,531.62x = 32,530,110,968.21
  5. Step 5: Solve for x
    x = 32,530,110,968.21/208,531.62
  6. Step 6: Final answer
    x = 155,996.06

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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.