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Finding the Fourth Proportional to 247,390.79, 341,388.81 and 139,962.65

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Solution

The fourth proportional to 247,390.79, 341,388.81 and 139,962.65 is: 193,142.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,390.79 : 341,388.81 = 139,962.65 : x
  2. Step 2: Convert to fraction form
    247,390.79/341,388.81 = 139,962.65/x
  3. Step 3: Cross multiply
    247,390.79x = 341,388.81 × 139,962.65
  4. Step 4: Simplify right side
    247,390.79x = 47,781,682,527.95
  5. Step 5: Solve for x
    x = 47,781,682,527.95/247,390.79
  6. Step 6: Final answer
    x = 193,142.53

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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.