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Finding the Fourth Proportional to 99,015.73, 148,168.76 and 85,734.56

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Solution

The fourth proportional to 99,015.73, 148,168.76 and 85,734.56 is: 128,294.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,015.73 : 148,168.76 = 85,734.56 : x
  2. Step 2: Convert to fraction form
    99,015.73/148,168.76 = 85,734.56/x
  3. Step 3: Cross multiply
    99,015.73x = 148,168.76 × 85,734.56
  4. Step 4: Simplify right side
    99,015.73x = 12,703,183,444.35
  5. Step 5: Solve for x
    x = 12,703,183,444.35/99,015.73
  6. Step 6: Final answer
    x = 128,294.60

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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.