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Finding the Fourth Proportional to 66,321.76, 91,530.48 and 49,525.60

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Solution

The fourth proportional to 66,321.76, 91,530.48 and 49,525.60 is: 68,350.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,321.76 : 91,530.48 = 49,525.60 : x
  2. Step 2: Convert to fraction form
    66,321.76/91,530.48 = 49,525.60/x
  3. Step 3: Cross multiply
    66,321.76x = 91,530.48 × 49,525.60
  4. Step 4: Simplify right side
    66,321.76x = 4,533,101,940.29
  5. Step 5: Solve for x
    x = 4,533,101,940.29/66,321.76
  6. Step 6: Final answer
    x = 68,350.15

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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.