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Finding the Fourth Proportional to 93,372, 128,831.20 and 53,082.60

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Solution

The fourth proportional to 93,372, 128,831.20 and 53,082.60 is: 73,241.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,372 : 128,831.20 = 53,082.60 : x
  2. Step 2: Convert to fraction form
    93,372/128,831.20 = 53,082.60/x
  3. Step 3: Cross multiply
    93,372x = 128,831.20 × 53,082.60
  4. Step 4: Simplify right side
    93,372x = 6,838,695,057.12
  5. Step 5: Solve for x
    x = 6,838,695,057.12/93,372
  6. Step 6: Final answer
    x = 73,241.39

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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.