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Finding the Fourth Proportional to 89,842.60, 134,601.90 and 42,992.20

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Solution

The fourth proportional to 89,842.60, 134,601.90 and 42,992.20 is: 64,410.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,842.60 : 134,601.90 = 42,992.20 : x
  2. Step 2: Convert to fraction form
    89,842.60/134,601.90 = 42,992.20/x
  3. Step 3: Cross multiply
    89,842.60x = 134,601.90 × 42,992.20
  4. Step 4: Simplify right side
    89,842.60x = 5,786,831,805.18
  5. Step 5: Solve for x
    x = 5,786,831,805.18/89,842.60
  6. Step 6: Final answer
    x = 64,410.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.