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Finding the Fourth Proportional to 93,391.78, 128,880.03 and 53,105.54

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Solution

The fourth proportional to 93,391.78, 128,880.03 and 53,105.54 is: 73,285.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,391.78 : 128,880.03 = 53,105.54 : x
  2. Step 2: Convert to fraction form
    93,391.78/128,880.03 = 53,105.54/x
  3. Step 3: Cross multiply
    93,391.78x = 128,880.03 × 53,105.54
  4. Step 4: Simplify right side
    93,391.78x = 6,844,243,588.37
  5. Step 5: Solve for x
    x = 6,844,243,588.37/93,391.78
  6. Step 6: Final answer
    x = 73,285.29

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1.5x scale

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.