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Finding the Fourth Proportional to 125,942.88, 173,505.56 and 87,636.56

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Solution

The fourth proportional to 125,942.88, 173,505.56 and 87,636.56 is: 120,732.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,942.88 : 173,505.56 = 87,636.56 : x
  2. Step 2: Convert to fraction form
    125,942.88/173,505.56 = 87,636.56/x
  3. Step 3: Cross multiply
    125,942.88x = 173,505.56 × 87,636.56
  4. Step 4: Simplify right side
    125,942.88x = 15,205,429,113.56
  5. Step 5: Solve for x
    x = 15,205,429,113.56/125,942.88
  6. Step 6: Final answer
    x = 120,732.74

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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.