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Finding the Fourth Proportional to 254,359.12, 351,020 and 139,648.44

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Solution

The fourth proportional to 254,359.12, 351,020 and 139,648.44 is: 192,717.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,359.12 : 351,020 = 139,648.44 : x
  2. Step 2: Convert to fraction form
    254,359.12/351,020 = 139,648.44/x
  3. Step 3: Cross multiply
    254,359.12x = 351,020 × 139,648.44
  4. Step 4: Simplify right side
    254,359.12x = 49,019,395,408.80
  5. Step 5: Solve for x
    x = 49,019,395,408.80/254,359.12
  6. Step 6: Final answer
    x = 192,717.27

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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.