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Finding the Fourth Proportional to 87,858, 121,250.52 and 54,330.48

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Solution

The fourth proportional to 87,858, 121,250.52 and 54,330.48 is: 74,980.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,858 : 121,250.52 = 54,330.48 : x
  2. Step 2: Convert to fraction form
    87,858/121,250.52 = 54,330.48/x
  3. Step 3: Cross multiply
    87,858x = 121,250.52 × 54,330.48
  4. Step 4: Simplify right side
    87,858x = 6,587,598,951.85
  5. Step 5: Solve for x
    x = 6,587,598,951.85/87,858
  6. Step 6: Final answer
    x = 74,980.07

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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.