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Finding the Fourth Proportional to 70,530.21, 105,794.85 and 17,939.24

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Solution

The fourth proportional to 70,530.21, 105,794.85 and 17,939.24 is: 26,908.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,530.21 : 105,794.85 = 17,939.24 : x
  2. Step 2: Convert to fraction form
    70,530.21/105,794.85 = 17,939.24/x
  3. Step 3: Cross multiply
    70,530.21x = 105,794.85 × 17,939.24
  4. Step 4: Simplify right side
    70,530.21x = 1,897,879,204.91
  5. Step 5: Solve for x
    x = 1,897,879,204.91/70,530.21
  6. Step 6: Final answer
    x = 26,908.74

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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.