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Finding the Fourth Proportional to 66,173, 91,318.74 and 36,365

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Solution

The fourth proportional to 66,173, 91,318.74 and 36,365 is: 50,183.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,173 : 91,318.74 = 36,365 : x
  2. Step 2: Convert to fraction form
    66,173/91,318.74 = 36,365/x
  3. Step 3: Cross multiply
    66,173x = 91,318.74 × 36,365
  4. Step 4: Simplify right side
    66,173x = 3,320,805,980.10
  5. Step 5: Solve for x
    x = 3,320,805,980.10/66,173
  6. Step 6: Final answer
    x = 50,183.70

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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.