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Finding the Fourth Proportional to 251,817.26, 347,507.01 and 138,640.01

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Solution

The fourth proportional to 251,817.26, 347,507.01 and 138,640.01 is: 191,322.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,817.26 : 347,507.01 = 138,640.01 : x
  2. Step 2: Convert to fraction form
    251,817.26/347,507.01 = 138,640.01/x
  3. Step 3: Cross multiply
    251,817.26x = 347,507.01 × 138,640.01
  4. Step 4: Simplify right side
    251,817.26x = 48,178,373,603.94
  5. Step 5: Solve for x
    x = 48,178,373,603.94/251,817.26
  6. Step 6: Final answer
    x = 191,322.77

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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.