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Finding the Fourth Proportional to 247,407.06, 341,421.75 and 139,974.78

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Solution

The fourth proportional to 247,407.06, 341,421.75 and 139,974.78 is: 193,165.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,407.06 : 341,421.75 = 139,974.78 : x
  2. Step 2: Convert to fraction form
    247,407.06/341,421.75 = 139,974.78/x
  3. Step 3: Cross multiply
    247,407.06x = 341,421.75 × 139,974.78
  4. Step 4: Simplify right side
    247,407.06x = 47,790,434,343.47
  5. Step 5: Solve for x
    x = 47,790,434,343.47/247,407.06
  6. Step 6: Final answer
    x = 193,165.20

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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.