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Finding the Fourth Proportional to 78,930.93, 108,892.43 and 58,283.90

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Solution

The fourth proportional to 78,930.93, 108,892.43 and 58,283.90 is: 80,407.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,930.93 : 108,892.43 = 58,283.90 : x
  2. Step 2: Convert to fraction form
    78,930.93/108,892.43 = 58,283.90/x
  3. Step 3: Cross multiply
    78,930.93x = 108,892.43 × 58,283.90
  4. Step 4: Simplify right side
    78,930.93x = 6,346,675,500.88
  5. Step 5: Solve for x
    x = 6,346,675,500.88/78,930.93
  6. Step 6: Final answer
    x = 80,407.97

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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.