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Finding the Fourth Proportional to 252,878.43, 348,979.28 and 139,708.47

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Solution

The fourth proportional to 252,878.43, 348,979.28 and 139,708.47 is: 192,801.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,878.43 : 348,979.28 = 139,708.47 : x
  2. Step 2: Convert to fraction form
    252,878.43/348,979.28 = 139,708.47/x
  3. Step 3: Cross multiply
    252,878.43x = 348,979.28 × 139,708.47
  4. Step 4: Simplify right side
    252,878.43x = 48,755,360,571.96
  5. Step 5: Solve for x
    x = 48,755,360,571.96/252,878.43
  6. Step 6: Final answer
    x = 192,801.58

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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.