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Finding the Fourth Proportional to 142,687.79, 214,033.79 and 67,815.58

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Solution

The fourth proportional to 142,687.79, 214,033.79 and 67,815.58 is: 101,724.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,687.79 : 214,033.79 = 67,815.58 : x
  2. Step 2: Convert to fraction form
    142,687.79/214,033.79 = 67,815.58/x
  3. Step 3: Cross multiply
    142,687.79x = 214,033.79 × 67,815.58
  4. Step 4: Simplify right side
    142,687.79x = 14,514,824,734.29
  5. Step 5: Solve for x
    x = 14,514,824,734.29/142,687.79
  6. Step 6: Final answer
    x = 101,724.36

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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.