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Finding the Fourth Proportional to 66,280.36, 91,465.54 and 36,066.28

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Solution

The fourth proportional to 66,280.36, 91,465.54 and 36,066.28 is: 49,770.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,280.36 : 91,465.54 = 36,066.28 : x
  2. Step 2: Convert to fraction form
    66,280.36/91,465.54 = 36,066.28/x
  3. Step 3: Cross multiply
    66,280.36x = 91,465.54 × 36,066.28
  4. Step 4: Simplify right side
    66,280.36x = 3,298,821,775.99
  5. Step 5: Solve for x
    x = 3,298,821,775.99/66,280.36
  6. Step 6: Final answer
    x = 49,770.73

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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.