Home / 189,264.30-261,118.78-121,318.74

Finding the Fourth Proportional to 189,264.30, 261,118.78 and 121,318.74

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Solution

The fourth proportional to 189,264.30, 261,118.78 and 121,318.74 is: 167,377.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,264.30 : 261,118.78 = 121,318.74 : x
  2. Step 2: Convert to fraction form
    189,264.30/261,118.78 = 121,318.74/x
  3. Step 3: Cross multiply
    189,264.30x = 261,118.78 × 121,318.74
  4. Step 4: Simplify right side
    189,264.30x = 31,678,601,076.64
  5. Step 5: Solve for x
    x = 31,678,601,076.64/189,264.30
  6. Step 6: Final answer
    x = 167,377.58

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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.