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Finding the Fourth Proportional to 257,203.01, 385,804.55 and 107,361.56

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Solution

The fourth proportional to 257,203.01, 385,804.55 and 107,361.56 is: 161,042.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,203.01 : 385,804.55 = 107,361.56 : x
  2. Step 2: Convert to fraction form
    257,203.01/385,804.55 = 107,361.56/x
  3. Step 3: Cross multiply
    257,203.01x = 385,804.55 × 107,361.56
  4. Step 4: Simplify right side
    257,203.01x = 41,420,575,877.27
  5. Step 5: Solve for x
    x = 41,420,575,877.27/257,203.01
  6. Step 6: Final answer
    x = 161,042.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.