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Finding the Fourth Proportional to 159,607.92, 220,260.42 and 87,990.51

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Solution

The fourth proportional to 159,607.92, 220,260.42 and 87,990.51 is: 121,427.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,607.92 : 220,260.42 = 87,990.51 : x
  2. Step 2: Convert to fraction form
    159,607.92/220,260.42 = 87,990.51/x
  3. Step 3: Cross multiply
    159,607.92x = 220,260.42 × 87,990.51
  4. Step 4: Simplify right side
    159,607.92x = 19,380,826,688.61
  5. Step 5: Solve for x
    x = 19,380,826,688.61/159,607.92
  6. Step 6: Final answer
    x = 121,427.73

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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.