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Finding the Fourth Proportional to 252,105.42, 347,903.82 and 138,928.26

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Solution

The fourth proportional to 252,105.42, 347,903.82 and 138,928.26 is: 191,720.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,105.42 : 347,903.82 = 138,928.26 : x
  2. Step 2: Convert to fraction form
    252,105.42/347,903.82 = 138,928.26/x
  3. Step 3: Cross multiply
    252,105.42x = 347,903.82 × 138,928.26
  4. Step 4: Simplify right side
    252,105.42x = 48,333,672,359.95
  5. Step 5: Solve for x
    x = 48,333,672,359.95/252,105.42
  6. Step 6: Final answer
    x = 191,720.08

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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.