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Finding the Fourth Proportional to 208,600.40, 287,869.92 and 113,108.56

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Solution

The fourth proportional to 208,600.40, 287,869.92 and 113,108.56 is: 156,090.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,600.40 : 287,869.92 = 113,108.56 : x
  2. Step 2: Convert to fraction form
    208,600.40/287,869.92 = 113,108.56/x
  3. Step 3: Cross multiply
    208,600.40x = 287,869.92 × 113,108.56
  4. Step 4: Simplify right side
    208,600.40x = 32,560,552,118.52
  5. Step 5: Solve for x
    x = 32,560,552,118.52/208,600.40
  6. Step 6: Final answer
    x = 156,090.55

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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.