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Finding the Fourth Proportional to 143,921.90, 215,688.45 and 96,401.90

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Solution

The fourth proportional to 143,921.90, 215,688.45 and 96,401.90 is: 144,472.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,921.90 : 215,688.45 = 96,401.90 : x
  2. Step 2: Convert to fraction form
    143,921.90/215,688.45 = 96,401.90/x
  3. Step 3: Cross multiply
    143,921.90x = 215,688.45 × 96,401.90
  4. Step 4: Simplify right side
    143,921.90x = 20,792,776,388.06
  5. Step 5: Solve for x
    x = 20,792,776,388.06/143,921.90
  6. Step 6: Final answer
    x = 144,472.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.