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Finding the Fourth Proportional to 66,646.22, 91,971.56 and 36,431.55

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Solution

The fourth proportional to 66,646.22, 91,971.56 and 36,431.55 is: 50,275.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,646.22 : 91,971.56 = 36,431.55 : x
  2. Step 2: Convert to fraction form
    66,646.22/91,971.56 = 36,431.55/x
  3. Step 3: Cross multiply
    66,646.22x = 91,971.56 × 36,431.55
  4. Step 4: Simplify right side
    66,646.22x = 3,350,666,577.80
  5. Step 5: Solve for x
    x = 3,350,666,577.80/66,646.22
  6. Step 6: Final answer
    x = 50,275.42

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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.