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Finding the Fourth Proportional to 251,389.92, 346,922.16 and 138,211.68

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Solution

The fourth proportional to 251,389.92, 346,922.16 and 138,211.68 is: 190,734.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,389.92 : 346,922.16 = 138,211.68 : x
  2. Step 2: Convert to fraction form
    251,389.92/346,922.16 = 138,211.68/x
  3. Step 3: Cross multiply
    251,389.92x = 346,922.16 × 138,211.68
  4. Step 4: Simplify right side
    251,389.92x = 47,948,694,562.83
  5. Step 5: Solve for x
    x = 47,948,694,562.83/251,389.92
  6. Step 6: Final answer
    x = 190,734.36

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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.