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Finding the Fourth Proportional to 55,431.25, 83,147.60 and 18,495.25

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Solution

The fourth proportional to 55,431.25, 83,147.60 and 18,495.25 is: 27,743.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,431.25 : 83,147.60 = 18,495.25 : x
  2. Step 2: Convert to fraction form
    55,431.25/83,147.60 = 18,495.25/x
  3. Step 3: Cross multiply
    55,431.25x = 83,147.60 × 18,495.25
  4. Step 4: Simplify right side
    55,431.25x = 1,537,835,556.42
  5. Step 5: Solve for x
    x = 1,537,835,556.42/55,431.25
  6. Step 6: Final answer
    x = 27,743.12

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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.