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Finding the Fourth Proportional to 70,320.24, 105,466.92 and 21,072.24

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Solution

The fourth proportional to 70,320.24, 105,466.92 and 21,072.24 is: 31,604.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,320.24 : 105,466.92 = 21,072.24 : x
  2. Step 2: Convert to fraction form
    70,320.24/105,466.92 = 21,072.24/x
  3. Step 3: Cross multiply
    70,320.24x = 105,466.92 × 21,072.24
  4. Step 4: Simplify right side
    70,320.24x = 2,222,424,250.30
  5. Step 5: Solve for x
    x = 2,222,424,250.30/70,320.24
  6. Step 6: Final answer
    x = 31,604.33

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1.5x scale

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.