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Finding the Fourth Proportional to 247,311.88, 341,298.12 and 139,879.81

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Solution

The fourth proportional to 247,311.88, 341,298.12 and 139,879.81 is: 193,038.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,311.88 : 341,298.12 = 139,879.81 : x
  2. Step 2: Convert to fraction form
    247,311.88/341,298.12 = 139,879.81/x
  3. Step 3: Cross multiply
    247,311.88x = 341,298.12 × 139,879.81
  4. Step 4: Simplify right side
    247,311.88x = 47,740,716,178.96
  5. Step 5: Solve for x
    x = 47,740,716,178.96/247,311.88
  6. Step 6: Final answer
    x = 193,038.51

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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.