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Finding the Fourth Proportional to 123,431.60, 185,147.40 and 115,655.60

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Solution

The fourth proportional to 123,431.60, 185,147.40 and 115,655.60 is: 173,483.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,431.60 : 185,147.40 = 115,655.60 : x
  2. Step 2: Convert to fraction form
    123,431.60/185,147.40 = 115,655.60/x
  3. Step 3: Cross multiply
    123,431.60x = 185,147.40 × 115,655.60
  4. Step 4: Simplify right side
    123,431.60x = 21,413,333,635.44
  5. Step 5: Solve for x
    x = 21,413,333,635.44/123,431.60
  6. Step 6: Final answer
    x = 173,483.40

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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.