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Finding the Fourth Proportional to 251,971.01, 347,720.02 and 138,793.76

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Solution

The fourth proportional to 251,971.01, 347,720.02 and 138,793.76 is: 191,535.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,971.01 : 347,720.02 = 138,793.76 : x
  2. Step 2: Convert to fraction form
    251,971.01/347,720.02 = 138,793.76/x
  3. Step 3: Cross multiply
    251,971.01x = 347,720.02 × 138,793.76
  4. Step 4: Simplify right side
    251,971.01x = 48,261,369,003.08
  5. Step 5: Solve for x
    x = 48,261,369,003.08/251,971.01
  6. Step 6: Final answer
    x = 191,535.40

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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.