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Finding the Fourth Proportional to 235,506.90, 324,996.44 and 128,074.65

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Solution

The fourth proportional to 235,506.90, 324,996.44 and 128,074.65 is: 176,741.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,506.90 : 324,996.44 = 128,074.65 : x
  2. Step 2: Convert to fraction form
    235,506.90/324,996.44 = 128,074.65/x
  3. Step 3: Cross multiply
    235,506.90x = 324,996.44 × 128,074.65
  4. Step 4: Simplify right side
    235,506.90x = 41,623,804,165.56
  5. Step 5: Solve for x
    x = 41,623,804,165.56/235,506.90
  6. Step 6: Final answer
    x = 176,741.33

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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.