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Finding the Fourth Proportional to 198,898.93, 298,292.79 and 78,901.88

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Solution

The fourth proportional to 198,898.93, 298,292.79 and 78,901.88 is: 118,330.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,898.93 : 298,292.79 = 78,901.88 : x
  2. Step 2: Convert to fraction form
    198,898.93/298,292.79 = 78,901.88/x
  3. Step 3: Cross multiply
    198,898.93x = 298,292.79 × 78,901.88
  4. Step 4: Simplify right side
    198,898.93x = 23,535,861,921.45
  5. Step 5: Solve for x
    x = 23,535,861,921.45/198,898.93
  6. Step 6: Final answer
    x = 118,330.76

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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.