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Finding the Fourth Proportional to 66,458.68, 91,724.50 and 63,469.37

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Solution

The fourth proportional to 66,458.68, 91,724.50 and 63,469.37 is: 87,598.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,458.68 : 91,724.50 = 63,469.37 : x
  2. Step 2: Convert to fraction form
    66,458.68/91,724.50 = 63,469.37/x
  3. Step 3: Cross multiply
    66,458.68x = 91,724.50 × 63,469.37
  4. Step 4: Simplify right side
    66,458.68x = 5,821,696,537.21
  5. Step 5: Solve for x
    x = 5,821,696,537.21/66,458.68
  6. Step 6: Final answer
    x = 87,598.74

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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.