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Finding the Fourth Proportional to 93,156, 128,562.96 and 53,419.68

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Solution

The fourth proportional to 93,156, 128,562.96 and 53,419.68 is: 73,723.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,156 : 128,562.96 = 53,419.68 : x
  2. Step 2: Convert to fraction form
    93,156/128,562.96 = 53,419.68/x
  3. Step 3: Cross multiply
    93,156x = 128,562.96 × 53,419.68
  4. Step 4: Simplify right side
    93,156x = 6,867,792,183.05
  5. Step 5: Solve for x
    x = 6,867,792,183.05/93,156
  6. Step 6: Final answer
    x = 73,723.56

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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.