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Finding the Fourth Proportional to 99,608.68, 137,469.54 and 57,174.76

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Solution

The fourth proportional to 99,608.68, 137,469.54 and 57,174.76 is: 78,906.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,608.68 : 137,469.54 = 57,174.76 : x
  2. Step 2: Convert to fraction form
    99,608.68/137,469.54 = 57,174.76/x
  3. Step 3: Cross multiply
    99,608.68x = 137,469.54 × 57,174.76
  4. Step 4: Simplify right side
    99,608.68x = 7,859,787,956.81
  5. Step 5: Solve for x
    x = 7,859,787,956.81/99,608.68
  6. Step 6: Final answer
    x = 78,906.66

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1.5x scale

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.