Home / 66,511.12-91,786.32-39,669.24

Finding the Fourth Proportional to 66,511.12, 91,786.32 and 39,669.24

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Solution

The fourth proportional to 66,511.12, 91,786.32 and 39,669.24 is: 54,744.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,511.12 : 91,786.32 = 39,669.24 : x
  2. Step 2: Convert to fraction form
    66,511.12/91,786.32 = 39,669.24/x
  3. Step 3: Cross multiply
    66,511.12x = 91,786.32 × 39,669.24
  4. Step 4: Simplify right side
    66,511.12x = 3,641,093,556.80
  5. Step 5: Solve for x
    x = 3,641,093,556.80/66,511.12
  6. Step 6: Final answer
    x = 54,744.13

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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.