Home / 151,105.12-208,512.21-87,446.86

Finding the Fourth Proportional to 151,105.12, 208,512.21 and 87,446.86

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Solution

The fourth proportional to 151,105.12, 208,512.21 and 87,446.86 is: 120,669.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,105.12 : 208,512.21 = 87,446.86 : x
  2. Step 2: Convert to fraction form
    151,105.12/208,512.21 = 87,446.86/x
  3. Step 3: Cross multiply
    151,105.12x = 208,512.21 × 87,446.86
  4. Step 4: Simplify right side
    151,105.12x = 18,233,738,036.16
  5. Step 5: Solve for x
    x = 18,233,738,036.16/151,105.12
  6. Step 6: Final answer
    x = 120,669.23

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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.