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Finding the Fourth Proportional to 158,619, 218,894.22 and 87,963

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Solution

The fourth proportional to 158,619, 218,894.22 and 87,963 is: 121,388.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,619 : 218,894.22 = 87,963 : x
  2. Step 2: Convert to fraction form
    158,619/218,894.22 = 87,963/x
  3. Step 3: Cross multiply
    158,619x = 218,894.22 × 87,963
  4. Step 4: Simplify right side
    158,619x = 19,254,592,273.86
  5. Step 5: Solve for x
    x = 19,254,592,273.86/158,619
  6. Step 6: Final answer
    x = 121,388.94

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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.