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Finding the Fourth Proportional to 70,601.43, 105,905.79 and 18,011.37

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Solution

The fourth proportional to 70,601.43, 105,905.79 and 18,011.37 is: 27,017.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,601.43 : 105,905.79 = 18,011.37 : x
  2. Step 2: Convert to fraction form
    70,601.43/105,905.79 = 18,011.37/x
  3. Step 3: Cross multiply
    70,601.43x = 105,905.79 × 18,011.37
  4. Step 4: Simplify right side
    70,601.43x = 1,907,508,368.83
  5. Step 5: Solve for x
    x = 1,907,508,368.83/70,601.43
  6. Step 6: Final answer
    x = 27,017.98

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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.