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Finding the Fourth Proportional to 159,356.48, 219,911.40 and 87,736.64

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Solution

The fourth proportional to 159,356.48, 219,911.40 and 87,736.64 is: 121,076.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,356.48 : 219,911.40 = 87,736.64 : x
  2. Step 2: Convert to fraction form
    159,356.48/219,911.40 = 87,736.64/x
  3. Step 3: Cross multiply
    159,356.48x = 219,911.40 × 87,736.64
  4. Step 4: Simplify right side
    159,356.48x = 19,294,287,333.70
  5. Step 5: Solve for x
    x = 19,294,287,333.70/159,356.48
  6. Step 6: Final answer
    x = 121,076.26

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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.