Home / 120,926.78-166,815.20-71,840.37

Finding the Fourth Proportional to 120,926.78, 166,815.20 and 71,840.37

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Solution

The fourth proportional to 120,926.78, 166,815.20 and 71,840.37 is: 99,101.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,926.78 : 166,815.20 = 71,840.37 : x
  2. Step 2: Convert to fraction form
    120,926.78/166,815.20 = 71,840.37/x
  3. Step 3: Cross multiply
    120,926.78x = 166,815.20 × 71,840.37
  4. Step 4: Simplify right side
    120,926.78x = 11,984,065,869.22
  5. Step 5: Solve for x
    x = 11,984,065,869.22/120,926.78
  6. Step 6: Final answer
    x = 99,101.84

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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.