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Finding the Fourth Proportional to 251,391.64, 346,911.60 and 138,213.52

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Solution

The fourth proportional to 251,391.64, 346,911.60 and 138,213.52 is: 190,729.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,391.64 : 346,911.60 = 138,213.52 : x
  2. Step 2: Convert to fraction form
    251,391.64/346,911.60 = 138,213.52/x
  3. Step 3: Cross multiply
    251,391.64x = 346,911.60 × 138,213.52
  4. Step 4: Simplify right side
    251,391.64x = 47,947,873,364.83
  5. Step 5: Solve for x
    x = 47,947,873,364.83/251,391.64
  6. Step 6: Final answer
    x = 190,729.78

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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.