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Finding the Fourth Proportional to 70,329.88, 105,494.84 and 21,081.88

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Solution

The fourth proportional to 70,329.88, 105,494.84 and 21,081.88 is: 31,622.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,329.88 : 105,494.84 = 21,081.88 : x
  2. Step 2: Convert to fraction form
    70,329.88/105,494.84 = 21,081.88/x
  3. Step 3: Cross multiply
    70,329.88x = 105,494.84 × 21,081.88
  4. Step 4: Simplify right side
    70,329.88x = 2,224,028,924.62
  5. Step 5: Solve for x
    x = 2,224,028,924.62/70,329.88
  6. Step 6: Final answer
    x = 31,622.82

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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.