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Finding the Fourth Proportional to 93,178.82, 128,543.78 and 54,912.23

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Solution

The fourth proportional to 93,178.82, 128,543.78 and 54,912.23 is: 75,753.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,178.82 : 128,543.78 = 54,912.23 : x
  2. Step 2: Convert to fraction form
    93,178.82/128,543.78 = 54,912.23/x
  3. Step 3: Cross multiply
    93,178.82x = 128,543.78 × 54,912.23
  4. Step 4: Simplify right side
    93,178.82x = 7,058,624,695.15
  5. Step 5: Solve for x
    x = 7,058,624,695.15/93,178.82
  6. Step 6: Final answer
    x = 75,753.54

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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.