Home / 149,647.20-206,511.84-81,665.52

Finding the Fourth Proportional to 149,647.20, 206,511.84 and 81,665.52

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Solution

The fourth proportional to 149,647.20, 206,511.84 and 81,665.52 is: 112,697.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,647.20 : 206,511.84 = 81,665.52 : x
  2. Step 2: Convert to fraction form
    149,647.20/206,511.84 = 81,665.52/x
  3. Step 3: Cross multiply
    149,647.20x = 206,511.84 × 81,665.52
  4. Step 4: Simplify right side
    149,647.20x = 16,864,896,799.76
  5. Step 5: Solve for x
    x = 16,864,896,799.76/149,647.20
  6. Step 6: Final answer
    x = 112,697.71

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1.5x scale

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.