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Finding the Fourth Proportional to 251,370, 346,891.20 and 138,193.56

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Solution

The fourth proportional to 251,370, 346,891.20 and 138,193.56 is: 190,707.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,370 : 346,891.20 = 138,193.56 : x
  2. Step 2: Convert to fraction form
    251,370/346,891.20 = 138,193.56/x
  3. Step 3: Cross multiply
    251,370x = 346,891.20 × 138,193.56
  4. Step 4: Simplify right side
    251,370x = 47,938,129,860.67
  5. Step 5: Solve for x
    x = 47,938,129,860.67/251,370
  6. Step 6: Final answer
    x = 190,707.44

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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.