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Finding the Fourth Proportional to 261,063.87, 391,596.11 and 71,525.88

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Solution

The fourth proportional to 261,063.87, 391,596.11 and 71,525.88 is: 107,288.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,063.87 : 391,596.11 = 71,525.88 : x
  2. Step 2: Convert to fraction form
    261,063.87/391,596.11 = 71,525.88/x
  3. Step 3: Cross multiply
    261,063.87x = 391,596.11 × 71,525.88
  4. Step 4: Simplify right side
    261,063.87x = 28,009,256,733.02
  5. Step 5: Solve for x
    x = 28,009,256,733.02/261,063.87
  6. Step 6: Final answer
    x = 107,288.91

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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.