Home / 189,197.02-261,129.72-108,679.78

Finding the Fourth Proportional to 189,197.02, 261,129.72 and 108,679.78

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Solution

The fourth proportional to 189,197.02, 261,129.72 and 108,679.78 is: 149,999.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,197.02 : 261,129.72 = 108,679.78 : x
  2. Step 2: Convert to fraction form
    189,197.02/261,129.72 = 108,679.78/x
  3. Step 3: Cross multiply
    189,197.02x = 261,129.72 × 108,679.78
  4. Step 4: Simplify right side
    189,197.02x = 28,379,520,521.06
  5. Step 5: Solve for x
    x = 28,379,520,521.06/189,197.02
  6. Step 6: Final answer
    x = 149,999.83

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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.