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Finding the Fourth Proportional to 155,673.48, 214,817.22 and 87,687.48

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Solution

The fourth proportional to 155,673.48, 214,817.22 and 87,687.48 is: 121,001.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,673.48 : 214,817.22 = 87,687.48 : x
  2. Step 2: Convert to fraction form
    155,673.48/214,817.22 = 87,687.48/x
  3. Step 3: Cross multiply
    155,673.48x = 214,817.22 × 87,687.48
  4. Step 4: Simplify right side
    155,673.48x = 18,836,780,682.41
  5. Step 5: Solve for x
    x = 18,836,780,682.41/155,673.48
  6. Step 6: Final answer
    x = 121,001.86

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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.