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Finding the Fourth Proportional to 70,372.74, 105,566.03 and 20,453.25

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Solution

The fourth proportional to 70,372.74, 105,566.03 and 20,453.25 is: 30,681.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,372.74 : 105,566.03 = 20,453.25 : x
  2. Step 2: Convert to fraction form
    70,372.74/105,566.03 = 20,453.25/x
  3. Step 3: Cross multiply
    70,372.74x = 105,566.03 × 20,453.25
  4. Step 4: Simplify right side
    70,372.74x = 2,159,168,300.83
  5. Step 5: Solve for x
    x = 2,159,168,300.83/70,372.74
  6. Step 6: Final answer
    x = 30,681.88

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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.