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Finding the Fourth Proportional to 205,420.60, 308,649.30 and 130,576.60

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Solution

The fourth proportional to 205,420.60, 308,649.30 and 130,576.60 is: 196,194.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,420.60 : 308,649.30 = 130,576.60 : x
  2. Step 2: Convert to fraction form
    205,420.60/308,649.30 = 130,576.60/x
  3. Step 3: Cross multiply
    205,420.60x = 308,649.30 × 130,576.60
  4. Step 4: Simplify right side
    205,420.60x = 40,302,376,186.38
  5. Step 5: Solve for x
    x = 40,302,376,186.38/205,420.60
  6. Step 6: Final answer
    x = 196,194.42

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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.