Home / 198,585.78-297,711.36-86,181.36

Finding the Fourth Proportional to 198,585.78, 297,711.36 and 86,181.36

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Solution

The fourth proportional to 198,585.78, 297,711.36 and 86,181.36 is: 129,199.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,585.78 : 297,711.36 = 86,181.36 : x
  2. Step 2: Convert to fraction form
    198,585.78/297,711.36 = 86,181.36/x
  3. Step 3: Cross multiply
    198,585.78x = 297,711.36 × 86,181.36
  4. Step 4: Simplify right side
    198,585.78x = 25,657,169,892.25
  5. Step 5: Solve for x
    x = 25,657,169,892.25/198,585.78
  6. Step 6: Final answer
    x = 129,199.43

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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.