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Finding the Fourth Proportional to 260,955.60, 391,494.72 and 81,031.83

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Solution

The fourth proportional to 260,955.60, 391,494.72 and 81,031.83 is: 121,566.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,955.60 : 391,494.72 = 81,031.83 : x
  2. Step 2: Convert to fraction form
    260,955.60/391,494.72 = 81,031.83/x
  3. Step 3: Cross multiply
    260,955.60x = 391,494.72 × 81,031.83
  4. Step 4: Simplify right side
    260,955.60x = 31,723,533,596.94
  5. Step 5: Solve for x
    x = 31,723,533,596.94/260,955.60
  6. Step 6: Final answer
    x = 121,566.79

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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.