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Finding the Fourth Proportional to 70,626.36, 105,938.82 and 21,378.36

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Solution

The fourth proportional to 70,626.36, 105,938.82 and 21,378.36 is: 32,067.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,626.36 : 105,938.82 = 21,378.36 : x
  2. Step 2: Convert to fraction form
    70,626.36/105,938.82 = 21,378.36/x
  3. Step 3: Cross multiply
    70,626.36x = 105,938.82 × 21,378.36
  4. Step 4: Simplify right side
    70,626.36x = 2,264,798,231.94
  5. Step 5: Solve for x
    x = 2,264,798,231.94/70,626.36
  6. Step 6: Final answer
    x = 32,067.32

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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.