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Finding the Fourth Proportional to 57,639.60, 86,313.60 and 45,975.60

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Solution

The fourth proportional to 57,639.60, 86,313.60 and 45,975.60 is: 68,847.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,639.60 : 86,313.60 = 45,975.60 : x
  2. Step 2: Convert to fraction form
    57,639.60/86,313.60 = 45,975.60/x
  3. Step 3: Cross multiply
    57,639.60x = 86,313.60 × 45,975.60
  4. Step 4: Simplify right side
    57,639.60x = 3,968,319,548.16
  5. Step 5: Solve for x
    x = 3,968,319,548.16/57,639.60
  6. Step 6: Final answer
    x = 68,847.10

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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.