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Finding the Fourth Proportional to 66,287.94, 91,474.02 and 36,072.51

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Solution

The fourth proportional to 66,287.94, 91,474.02 and 36,072.51 is: 49,778.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,287.94 : 91,474.02 = 36,072.51 : x
  2. Step 2: Convert to fraction form
    66,287.94/91,474.02 = 36,072.51/x
  3. Step 3: Cross multiply
    66,287.94x = 91,474.02 × 36,072.51
  4. Step 4: Simplify right side
    66,287.94x = 3,299,697,501.19
  5. Step 5: Solve for x
    x = 3,299,697,501.19/66,287.94
  6. Step 6: Final answer
    x = 49,778.25

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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.