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Finding the Fourth Proportional to 71,125.69, 106,619.20 and 28,418.39

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Solution

The fourth proportional to 71,125.69, 106,619.20 and 28,418.39 is: 42,599.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,125.69 : 106,619.20 = 28,418.39 : x
  2. Step 2: Convert to fraction form
    71,125.69/106,619.20 = 28,418.39/x
  3. Step 3: Cross multiply
    71,125.69x = 106,619.20 × 28,418.39
  4. Step 4: Simplify right side
    71,125.69x = 3,029,945,802.77
  5. Step 5: Solve for x
    x = 3,029,945,802.77/71,125.69
  6. Step 6: Final answer
    x = 42,599.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.