Home / 120,589.20-166,391.64-72,810.54

Finding the Fourth Proportional to 120,589.20, 166,391.64 and 72,810.54

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Solution

The fourth proportional to 120,589.20, 166,391.64 and 72,810.54 is: 100,465.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,589.20 : 166,391.64 = 72,810.54 : x
  2. Step 2: Convert to fraction form
    120,589.20/166,391.64 = 72,810.54/x
  3. Step 3: Cross multiply
    120,589.20x = 166,391.64 × 72,810.54
  4. Step 4: Simplify right side
    120,589.20x = 12,115,065,159.89
  5. Step 5: Solve for x
    x = 12,115,065,159.89/120,589.20
  6. Step 6: Final answer
    x = 100,465.59

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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.