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Finding the Fourth Proportional to 143,285.80, 214,418.40 and 124,769.20

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Solution

The fourth proportional to 143,285.80, 214,418.40 and 124,769.20 is: 186,709.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,285.80 : 214,418.40 = 124,769.20 : x
  2. Step 2: Convert to fraction form
    143,285.80/214,418.40 = 124,769.20/x
  3. Step 3: Cross multiply
    143,285.80x = 214,418.40 × 124,769.20
  4. Step 4: Simplify right side
    143,285.80x = 26,752,812,233.28
  5. Step 5: Solve for x
    x = 26,752,812,233.28/143,285.80
  6. Step 6: Final answer
    x = 186,709.45

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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.