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Finding the Fourth Proportional to 208,632.33, 287,910.09 and 113,137.88

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Solution

The fourth proportional to 208,632.33, 287,910.09 and 113,137.88 is: 156,128.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,632.33 : 287,910.09 = 113,137.88 : x
  2. Step 2: Convert to fraction form
    208,632.33/287,910.09 = 113,137.88/x
  3. Step 3: Cross multiply
    208,632.33x = 287,910.09 × 113,137.88
  4. Step 4: Simplify right side
    208,632.33x = 32,573,535,773.66
  5. Step 5: Solve for x
    x = 32,573,535,773.66/208,632.33
  6. Step 6: Final answer
    x = 156,128.90

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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.