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Finding the Fourth Proportional to 247,089.60, 340,986.24 and 139,660.80

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Solution

The fourth proportional to 247,089.60, 340,986.24 and 139,660.80 is: 192,733.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,089.60 : 340,986.24 = 139,660.80 : x
  2. Step 2: Convert to fraction form
    247,089.60/340,986.24 = 139,660.80/x
  3. Step 3: Cross multiply
    247,089.60x = 340,986.24 × 139,660.80
  4. Step 4: Simplify right side
    247,089.60x = 47,622,411,067.39
  5. Step 5: Solve for x
    x = 47,622,411,067.39/247,089.60
  6. Step 6: Final answer
    x = 192,733.37

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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.