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Finding the Fourth Proportional to 64,728.46, 89,352.89 and 43,520.02

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Solution

The fourth proportional to 64,728.46, 89,352.89 and 43,520.02 is: 60,076.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,728.46 : 89,352.89 = 43,520.02 : x
  2. Step 2: Convert to fraction form
    64,728.46/89,352.89 = 43,520.02/x
  3. Step 3: Cross multiply
    64,728.46x = 89,352.89 × 43,520.02
  4. Step 4: Simplify right side
    64,728.46x = 3,888,639,559.86
  5. Step 5: Solve for x
    x = 3,888,639,559.86/64,728.46
  6. Step 6: Final answer
    x = 60,076.19

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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.