Home / 66,139.29-99,212.18-19,388.25

Finding the Fourth Proportional to 66,139.29, 99,212.18 and 19,388.25

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Solution

The fourth proportional to 66,139.29, 99,212.18 and 19,388.25 is: 29,083.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,139.29 : 99,212.18 = 19,388.25 : x
  2. Step 2: Convert to fraction form
    66,139.29/99,212.18 = 19,388.25/x
  3. Step 3: Cross multiply
    66,139.29x = 99,212.18 × 19,388.25
  4. Step 4: Simplify right side
    66,139.29x = 1,923,550,451.94
  5. Step 5: Solve for x
    x = 1,923,550,451.94/66,139.29
  6. Step 6: Final answer
    x = 29,083.32

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1.5x scale

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.