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Finding the Fourth Proportional to 71,805.80, 107,730.30 and 38,541.80

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Solution

The fourth proportional to 71,805.80, 107,730.30 and 38,541.80 is: 57,824.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,805.80 : 107,730.30 = 38,541.80 : x
  2. Step 2: Convert to fraction form
    71,805.80/107,730.30 = 38,541.80/x
  3. Step 3: Cross multiply
    71,805.80x = 107,730.30 × 38,541.80
  4. Step 4: Simplify right side
    71,805.80x = 4,152,119,676.54
  5. Step 5: Solve for x
    x = 4,152,119,676.54/71,805.80
  6. Step 6: Final answer
    x = 57,824.29

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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.