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Finding the Fourth Proportional to 93,451.49, 128,961.92 and 53,165.16

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Solution

The fourth proportional to 93,451.49, 128,961.92 and 53,165.16 is: 73,367.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,451.49 : 128,961.92 = 53,165.16 : x
  2. Step 2: Convert to fraction form
    93,451.49/128,961.92 = 53,165.16/x
  3. Step 3: Cross multiply
    93,451.49x = 128,961.92 × 53,165.16
  4. Step 4: Simplify right side
    93,451.49x = 6,856,281,243.62
  5. Step 5: Solve for x
    x = 6,856,281,243.62/93,451.49
  6. Step 6: Final answer
    x = 73,367.28

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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.