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Finding the Fourth Proportional to 159,335.20, 219,879.12 and 87,712.48

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Solution

The fourth proportional to 159,335.20, 219,879.12 and 87,712.48 is: 121,041.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,335.20 : 219,879.12 = 87,712.48 : x
  2. Step 2: Convert to fraction form
    159,335.20/219,879.12 = 87,712.48/x
  3. Step 3: Cross multiply
    159,335.20x = 219,879.12 × 87,712.48
  4. Step 4: Simplify right side
    159,335.20x = 19,286,142,915.42
  5. Step 5: Solve for x
    x = 19,286,142,915.42/159,335.20
  6. Step 6: Final answer
    x = 121,041.32

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.