Home / 189,406.64-261,380.97-121,423.55

Finding the Fourth Proportional to 189,406.64, 261,380.97 and 121,423.55

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Solution

The fourth proportional to 189,406.64, 261,380.97 and 121,423.55 is: 167,564.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,406.64 : 261,380.97 = 121,423.55 : x
  2. Step 2: Convert to fraction form
    189,406.64/261,380.97 = 121,423.55/x
  3. Step 3: Cross multiply
    189,406.64x = 261,380.97 × 121,423.55
  4. Step 4: Simplify right side
    189,406.64x = 31,737,803,972.94
  5. Step 5: Solve for x
    x = 31,737,803,972.94/189,406.64
  6. Step 6: Final answer
    x = 167,564.37

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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.