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Finding the Fourth Proportional to 159,331.80, 219,884.16 and 87,718.48

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Solution

The fourth proportional to 159,331.80, 219,884.16 and 87,718.48 is: 121,054.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,331.80 : 219,884.16 = 87,718.48 : x
  2. Step 2: Convert to fraction form
    159,331.80/219,884.16 = 87,718.48/x
  3. Step 3: Cross multiply
    159,331.80x = 219,884.16 × 87,718.48
  4. Step 4: Simplify right side
    159,331.80x = 19,287,904,291.28
  5. Step 5: Solve for x
    x = 19,287,904,291.28/159,331.80
  6. Step 6: Final answer
    x = 121,054.96

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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.