Home / 138,045.83-207,028.71-53,787.20

Finding the Fourth Proportional to 138,045.83, 207,028.71 and 53,787.20

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Solution

The fourth proportional to 138,045.83, 207,028.71 and 53,787.20 is: 80,665.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,045.83 : 207,028.71 = 53,787.20 : x
  2. Step 2: Convert to fraction form
    138,045.83/207,028.71 = 53,787.20/x
  3. Step 3: Cross multiply
    138,045.83x = 207,028.71 × 53,787.20
  4. Step 4: Simplify right side
    138,045.83x = 11,135,493,595.37
  5. Step 5: Solve for x
    x = 11,135,493,595.37/138,045.83
  6. Step 6: Final answer
    x = 80,665.20

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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.