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Finding the Fourth Proportional to 143,111.80, 214,667.70 and 101,121.40

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Solution

The fourth proportional to 143,111.80, 214,667.70 and 101,121.40 is: 151,682.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,111.80 : 214,667.70 = 101,121.40 : x
  2. Step 2: Convert to fraction form
    143,111.80/214,667.70 = 101,121.40/x
  3. Step 3: Cross multiply
    143,111.80x = 214,667.70 × 101,121.40
  4. Step 4: Simplify right side
    143,111.80x = 21,707,498,358.78
  5. Step 5: Solve for x
    x = 21,707,498,358.78/143,111.80
  6. Step 6: Final answer
    x = 151,682.10

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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.