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Finding the Fourth Proportional to 157,885.78, 217,879.84 and 86,264.27

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Solution

The fourth proportional to 157,885.78, 217,879.84 and 86,264.27 is: 119,043.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,885.78 : 217,879.84 = 86,264.27 : x
  2. Step 2: Convert to fraction form
    157,885.78/217,879.84 = 86,264.27/x
  3. Step 3: Cross multiply
    157,885.78x = 217,879.84 × 86,264.27
  4. Step 4: Simplify right side
    157,885.78x = 18,795,244,204.08
  5. Step 5: Solve for x
    x = 18,795,244,204.08/157,885.78
  6. Step 6: Final answer
    x = 119,043.30

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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.