Home / 66,640.29-99,911.06-40,338.81

Finding the Fourth Proportional to 66,640.29, 99,911.06 and 40,338.81

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Solution

The fourth proportional to 66,640.29, 99,911.06 and 40,338.81 is: 60,478.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,640.29 : 99,911.06 = 40,338.81 : x
  2. Step 2: Convert to fraction form
    66,640.29/99,911.06 = 40,338.81/x
  3. Step 3: Cross multiply
    66,640.29x = 99,911.06 × 40,338.81
  4. Step 4: Simplify right side
    66,640.29x = 4,030,293,064.54
  5. Step 5: Solve for x
    x = 4,030,293,064.54/66,640.29
  6. Step 6: Final answer
    x = 60,478.32

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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.