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Finding the Fourth Proportional to 247,990.05, 342,202.28 and 139,098.69

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Solution

The fourth proportional to 247,990.05, 342,202.28 and 139,098.69 is: 191,942.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,990.05 : 342,202.28 = 139,098.69 : x
  2. Step 2: Convert to fraction form
    247,990.05/342,202.28 = 139,098.69/x
  3. Step 3: Cross multiply
    247,990.05x = 342,202.28 × 139,098.69
  4. Step 4: Simplify right side
    247,990.05x = 47,599,888,167.52
  5. Step 5: Solve for x
    x = 47,599,888,167.52/247,990.05
  6. Step 6: Final answer
    x = 191,942.73

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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.