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Finding the Fourth Proportional to 70,583.63, 105,872.40 and 17,991.54

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Solution

The fourth proportional to 70,583.63, 105,872.40 and 17,991.54 is: 26,986.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,583.63 : 105,872.40 = 17,991.54 : x
  2. Step 2: Convert to fraction form
    70,583.63/105,872.40 = 17,991.54/x
  3. Step 3: Cross multiply
    70,583.63x = 105,872.40 × 17,991.54
  4. Step 4: Simplify right side
    70,583.63x = 1,904,807,519.50
  5. Step 5: Solve for x
    x = 1,904,807,519.50/70,583.63
  6. Step 6: Final answer
    x = 26,986.54

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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.