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Finding the Fourth Proportional to 98,628.30, 147,942.45 and 68,447.70

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Solution

The fourth proportional to 98,628.30, 147,942.45 and 68,447.70 is: 102,671.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,628.30 : 147,942.45 = 68,447.70 : x
  2. Step 2: Convert to fraction form
    98,628.30/147,942.45 = 68,447.70/x
  3. Step 3: Cross multiply
    98,628.30x = 147,942.45 × 68,447.70
  4. Step 4: Simplify right side
    98,628.30x = 10,126,320,434.87
  5. Step 5: Solve for x
    x = 10,126,320,434.87/98,628.30
  6. Step 6: Final answer
    x = 102,671.55

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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.