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Finding the Fourth Proportional to 45,958.29, 68,840.48 and 21,019.30

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Solution

The fourth proportional to 45,958.29, 68,840.48 and 21,019.30 is: 31,484.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,958.29 : 68,840.48 = 21,019.30 : x
  2. Step 2: Convert to fraction form
    45,958.29/68,840.48 = 21,019.30/x
  3. Step 3: Cross multiply
    45,958.29x = 68,840.48 × 21,019.30
  4. Step 4: Simplify right side
    45,958.29x = 1,446,978,581.71
  5. Step 5: Solve for x
    x = 1,446,978,581.71/45,958.29
  6. Step 6: Final answer
    x = 31,484.61

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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.