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Finding the Fourth Proportional to 228,090.60, 342,135.90 and 103,431.60

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Solution

The fourth proportional to 228,090.60, 342,135.90 and 103,431.60 is: 155,147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,090.60 : 342,135.90 = 103,431.60 : x
  2. Step 2: Convert to fraction form
    228,090.60/342,135.90 = 103,431.60/x
  3. Step 3: Cross multiply
    228,090.60x = 342,135.90 × 103,431.60
  4. Step 4: Simplify right side
    228,090.60x = 35,387,663,554.44
  5. Step 5: Solve for x
    x = 35,387,663,554.44/228,090.60
  6. Step 6: Final answer
    x = 155,147.40

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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.