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Finding the Fourth Proportional to 251,558.70, 347,156.40 and 138,381.45

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Solution

The fourth proportional to 251,558.70, 347,156.40 and 138,381.45 is: 190,969.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,558.70 : 347,156.40 = 138,381.45 : x
  2. Step 2: Convert to fraction form
    251,558.70/347,156.40 = 138,381.45/x
  3. Step 3: Cross multiply
    251,558.70x = 347,156.40 × 138,381.45
  4. Step 4: Simplify right side
    251,558.70x = 48,040,006,008.78
  5. Step 5: Solve for x
    x = 48,040,006,008.78/251,558.70
  6. Step 6: Final answer
    x = 190,969.37

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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.