Home / 189,682.98-261,652.91-121,675.78

Finding the Fourth Proportional to 189,682.98, 261,652.91 and 121,675.78

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Solution

The fourth proportional to 189,682.98, 261,652.91 and 121,675.78 is: 167,842.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,682.98 : 261,652.91 = 121,675.78 : x
  2. Step 2: Convert to fraction form
    189,682.98/261,652.91 = 121,675.78/x
  3. Step 3: Cross multiply
    189,682.98x = 261,652.91 × 121,675.78
  4. Step 4: Simplify right side
    189,682.98x = 31,836,821,913.52
  5. Step 5: Solve for x
    x = 31,836,821,913.52/189,682.98
  6. Step 6: Final answer
    x = 167,842.27

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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.