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Finding the Fourth Proportional to 159,428.62, 220,021.48 and 87,808.62

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Solution

The fourth proportional to 159,428.62, 220,021.48 and 87,808.62 is: 121,181.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,428.62 : 220,021.48 = 87,808.62 : x
  2. Step 2: Convert to fraction form
    159,428.62/220,021.48 = 87,808.62/x
  3. Step 3: Cross multiply
    159,428.62x = 220,021.48 × 87,808.62
  4. Step 4: Simplify right side
    159,428.62x = 19,319,783,464.00
  5. Step 5: Solve for x
    x = 19,319,783,464.00/159,428.62
  6. Step 6: Final answer
    x = 121,181.40

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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.