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Finding the Fourth Proportional to 70,695.80, 106,035.72 and 18,105.68

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Solution

The fourth proportional to 70,695.80, 106,035.72 and 18,105.68 is: 27,156.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,695.80 : 106,035.72 = 18,105.68 : x
  2. Step 2: Convert to fraction form
    70,695.80/106,035.72 = 18,105.68/x
  3. Step 3: Cross multiply
    70,695.80x = 106,035.72 × 18,105.68
  4. Step 4: Simplify right side
    70,695.80x = 1,919,848,814.89
  5. Step 5: Solve for x
    x = 1,919,848,814.89/70,695.80
  6. Step 6: Final answer
    x = 27,156.48

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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.