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Finding the Fourth Proportional to 247,389.79, 341,387.43 and 139,961.65

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Solution

The fourth proportional to 247,389.79, 341,387.43 and 139,961.65 is: 193,141.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,389.79 : 341,387.43 = 139,961.65 : x
  2. Step 2: Convert to fraction form
    247,389.79/341,387.43 = 139,961.65/x
  3. Step 3: Cross multiply
    247,389.79x = 341,387.43 × 139,961.65
  4. Step 4: Simplify right side
    247,389.79x = 47,781,147,992.06
  5. Step 5: Solve for x
    x = 47,781,147,992.06/247,389.79
  6. Step 6: Final answer
    x = 193,141.15

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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.