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Finding the Fourth Proportional to 66,071.78, 91,179.11 and 35,857.10

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Solution

The fourth proportional to 66,071.78, 91,179.11 and 35,857.10 is: 49,482.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,071.78 : 91,179.11 = 35,857.10 : x
  2. Step 2: Convert to fraction form
    66,071.78/91,179.11 = 35,857.10/x
  3. Step 3: Cross multiply
    66,071.78x = 91,179.11 × 35,857.10
  4. Step 4: Simplify right side
    66,071.78x = 3,269,418,782.77
  5. Step 5: Solve for x
    x = 3,269,418,782.77/66,071.78
  6. Step 6: Final answer
    x = 49,482.84

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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.