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Finding the Fourth Proportional to 208,472.04, 287,691.65 and 112,978.73

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Solution

The fourth proportional to 208,472.04, 287,691.65 and 112,978.73 is: 155,910.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,472.04 : 287,691.65 = 112,978.73 : x
  2. Step 2: Convert to fraction form
    208,472.04/287,691.65 = 112,978.73/x
  3. Step 3: Cross multiply
    208,472.04x = 287,691.65 × 112,978.73
  4. Step 4: Simplify right side
    208,472.04x = 32,503,035,245.25
  5. Step 5: Solve for x
    x = 32,503,035,245.25/208,472.04
  6. Step 6: Final answer
    x = 155,910.77

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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.