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Finding the Fourth Proportional to 252,439.54, 348,342.32 and 139,255

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Solution

The fourth proportional to 252,439.54, 348,342.32 and 139,255 is: 192,158.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,439.54 : 348,342.32 = 139,255 : x
  2. Step 2: Convert to fraction form
    252,439.54/348,342.32 = 139,255/x
  3. Step 3: Cross multiply
    252,439.54x = 348,342.32 × 139,255
  4. Step 4: Simplify right side
    252,439.54x = 48,508,409,771.60
  5. Step 5: Solve for x
    x = 48,508,409,771.60/252,439.54
  6. Step 6: Final answer
    x = 192,158.53

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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.