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Finding the Fourth Proportional to 155,718.89, 214,884.12 and 87,739.88

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Solution

The fourth proportional to 155,718.89, 214,884.12 and 87,739.88 is: 121,076.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,718.89 : 214,884.12 = 87,739.88 : x
  2. Step 2: Convert to fraction form
    155,718.89/214,884.12 = 87,739.88/x
  3. Step 3: Cross multiply
    155,718.89x = 214,884.12 × 87,739.88
  4. Step 4: Simplify right side
    155,718.89x = 18,853,906,902.71
  5. Step 5: Solve for x
    x = 18,853,906,902.71/155,718.89
  6. Step 6: Final answer
    x = 121,076.56

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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.