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Finding the Fourth Proportional to 66,082.49, 91,068.13 and 64,868.03

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Solution

The fourth proportional to 66,082.49, 91,068.13 and 64,868.03 is: 89,394.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,082.49 : 91,068.13 = 64,868.03 : x
  2. Step 2: Convert to fraction form
    66,082.49/91,068.13 = 64,868.03/x
  3. Step 3: Cross multiply
    66,082.49x = 91,068.13 × 64,868.03
  4. Step 4: Simplify right side
    66,082.49x = 5,907,410,188.88
  5. Step 5: Solve for x
    x = 5,907,410,188.88/66,082.49
  6. Step 6: Final answer
    x = 89,394.49

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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.