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Finding the Fourth Proportional to 66,020.68, 91,109 and 35,806.16

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Solution

The fourth proportional to 66,020.68, 91,109 and 35,806.16 is: 49,412.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,020.68 : 91,109 = 35,806.16 : x
  2. Step 2: Convert to fraction form
    66,020.68/91,109 = 35,806.16/x
  3. Step 3: Cross multiply
    66,020.68x = 91,109 × 35,806.16
  4. Step 4: Simplify right side
    66,020.68x = 3,262,263,431.44
  5. Step 5: Solve for x
    x = 3,262,263,431.44/66,020.68
  6. Step 6: Final answer
    x = 49,412.75

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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.