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Finding the Fourth Proportional to 66,082.64, 99,164.32 and 28,635.44

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Solution

The fourth proportional to 66,082.64, 99,164.32 and 28,635.44 is: 42,970.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,082.64 : 99,164.32 = 28,635.44 : x
  2. Step 2: Convert to fraction form
    66,082.64/99,164.32 = 28,635.44/x
  3. Step 3: Cross multiply
    66,082.64x = 99,164.32 × 28,635.44
  4. Step 4: Simplify right side
    66,082.64x = 2,839,613,935.50
  5. Step 5: Solve for x
    x = 2,839,613,935.50/66,082.64
  6. Step 6: Final answer
    x = 42,970.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.