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Finding the Fourth Proportional to 247,064.31, 340,939.80 and 139,632.12

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Solution

The fourth proportional to 247,064.31, 340,939.80 and 139,632.12 is: 192,687.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,064.31 : 340,939.80 = 139,632.12 : x
  2. Step 2: Convert to fraction form
    247,064.31/340,939.80 = 139,632.12/x
  3. Step 3: Cross multiply
    247,064.31x = 340,939.80 × 139,632.12
  4. Step 4: Simplify right side
    247,064.31x = 47,606,147,066.38
  5. Step 5: Solve for x
    x = 47,606,147,066.38/247,064.31
  6. Step 6: Final answer
    x = 192,687.27

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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.