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Finding the Fourth Proportional to 71,299.10, 107,053.79 and 39,770.77

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Solution

The fourth proportional to 71,299.10, 107,053.79 and 39,770.77 is: 59,714.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,299.10 : 107,053.79 = 39,770.77 : x
  2. Step 2: Convert to fraction form
    71,299.10/107,053.79 = 39,770.77/x
  3. Step 3: Cross multiply
    71,299.10x = 107,053.79 × 39,770.77
  4. Step 4: Simplify right side
    71,299.10x = 4,257,611,216.21
  5. Step 5: Solve for x
    x = 4,257,611,216.21/71,299.10
  6. Step 6: Final answer
    x = 59,714.79

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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.