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Finding the Fourth Proportional to 66,478.55, 91,742.12 and 36,264.38

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Solution

The fourth proportional to 66,478.55, 91,742.12 and 36,264.38 is: 50,045.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,478.55 : 91,742.12 = 36,264.38 : x
  2. Step 2: Convert to fraction form
    66,478.55/91,742.12 = 36,264.38/x
  3. Step 3: Cross multiply
    66,478.55x = 91,742.12 × 36,264.38
  4. Step 4: Simplify right side
    66,478.55x = 3,326,970,597.64
  5. Step 5: Solve for x
    x = 3,326,970,597.64/66,478.55
  6. Step 6: Final answer
    x = 50,045.78

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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.