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Finding the Fourth Proportional to 71,930.05, 107,894.90 and 19,339.53

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Solution

The fourth proportional to 71,930.05, 107,894.90 and 19,339.53 is: 29,009.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,930.05 : 107,894.90 = 19,339.53 : x
  2. Step 2: Convert to fraction form
    71,930.05/107,894.90 = 19,339.53/x
  3. Step 3: Cross multiply
    71,930.05x = 107,894.90 × 19,339.53
  4. Step 4: Simplify right side
    71,930.05x = 2,086,636,558.70
  5. Step 5: Solve for x
    x = 2,086,636,558.70/71,930.05
  6. Step 6: Final answer
    x = 29,009.25

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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.