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Finding the Fourth Proportional to 70,368.29, 105,511.97 and 21,668.96

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Solution

The fourth proportional to 70,368.29, 105,511.97 and 21,668.96 is: 32,490.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,368.29 : 105,511.97 = 21,668.96 : x
  2. Step 2: Convert to fraction form
    70,368.29/105,511.97 = 21,668.96/x
  3. Step 3: Cross multiply
    70,368.29x = 105,511.97 × 21,668.96
  4. Step 4: Simplify right side
    70,368.29x = 2,286,334,021.55
  5. Step 5: Solve for x
    x = 2,286,334,021.55/70,368.29
  6. Step 6: Final answer
    x = 32,490.97

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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.