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Finding the Fourth Proportional to 66,505.80, 91,775.16 and 36,290.37

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Solution

The fourth proportional to 66,505.80, 91,775.16 and 36,290.37 is: 50,079.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,505.80 : 91,775.16 = 36,290.37 : x
  2. Step 2: Convert to fraction form
    66,505.80/91,775.16 = 36,290.37/x
  3. Step 3: Cross multiply
    66,505.80x = 91,775.16 × 36,290.37
  4. Step 4: Simplify right side
    66,505.80x = 3,330,554,513.21
  5. Step 5: Solve for x
    x = 3,330,554,513.21/66,505.80
  6. Step 6: Final answer
    x = 50,079.16

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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.