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Finding the Fourth Proportional to 187,406.56, 281,147.40 and 69,078.40

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Solution

The fourth proportional to 187,406.56, 281,147.40 and 69,078.40 is: 103,631.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,406.56 : 281,147.40 = 69,078.40 : x
  2. Step 2: Convert to fraction form
    187,406.56/281,147.40 = 69,078.40/x
  3. Step 3: Cross multiply
    187,406.56x = 281,147.40 × 69,078.40
  4. Step 4: Simplify right side
    187,406.56x = 19,421,212,556.16
  5. Step 5: Solve for x
    x = 19,421,212,556.16/187,406.56
  6. Step 6: Final answer
    x = 103,631.44

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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.