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Finding the Fourth Proportional to 251,934.03, 347,653.01 and 138,756.78

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Solution

The fourth proportional to 251,934.03, 347,653.01 and 138,756.78 is: 191,475.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,934.03 : 347,653.01 = 138,756.78 : x
  2. Step 2: Convert to fraction form
    251,934.03/347,653.01 = 138,756.78/x
  3. Step 3: Cross multiply
    251,934.03x = 347,653.01 × 138,756.78
  4. Step 4: Simplify right side
    251,934.03x = 48,239,212,571.80
  5. Step 5: Solve for x
    x = 48,239,212,571.80/251,934.03
  6. Step 6: Final answer
    x = 191,475.57

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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.