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Finding the Fourth Proportional to 159,158, 219,639.88 and 87,539.20

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Solution

The fourth proportional to 159,158, 219,639.88 and 87,539.20 is: 120,805.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,158 : 219,639.88 = 87,539.20 : x
  2. Step 2: Convert to fraction form
    159,158/219,639.88 = 87,539.20/x
  3. Step 3: Cross multiply
    159,158x = 219,639.88 × 87,539.20
  4. Step 4: Simplify right side
    159,158x = 19,227,099,383.30
  5. Step 5: Solve for x
    x = 19,227,099,383.30/159,158
  6. Step 6: Final answer
    x = 120,805.11

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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.