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Finding the Fourth Proportional to 143,921.40, 215,687.70 and 96,401.40

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Solution

The fourth proportional to 143,921.40, 215,687.70 and 96,401.40 is: 144,471.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,921.40 : 215,687.70 = 96,401.40 : x
  2. Step 2: Convert to fraction form
    143,921.40/215,687.70 = 96,401.40/x
  3. Step 3: Cross multiply
    143,921.40x = 215,687.70 × 96,401.40
  4. Step 4: Simplify right side
    143,921.40x = 20,792,596,242.78
  5. Step 5: Solve for x
    x = 20,792,596,242.78/143,921.40
  6. Step 6: Final answer
    x = 144,471.89

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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.