Home / 149,772-206,686.40-81,787.24

Finding the Fourth Proportional to 149,772, 206,686.40 and 81,787.24

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Solution

The fourth proportional to 149,772, 206,686.40 and 81,787.24 is: 112,866.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,772 : 206,686.40 = 81,787.24 : x
  2. Step 2: Convert to fraction form
    149,772/206,686.40 = 81,787.24/x
  3. Step 3: Cross multiply
    149,772x = 206,686.40 × 81,787.24
  4. Step 4: Simplify right side
    149,772x = 16,904,310,201.54
  5. Step 5: Solve for x
    x = 16,904,310,201.54/149,772
  6. Step 6: Final answer
    x = 112,866.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.