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Finding the Fourth Proportional to 70,372.99, 105,566.40 and 20,453.50

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Solution

The fourth proportional to 70,372.99, 105,566.40 and 20,453.50 is: 30,682.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,372.99 : 105,566.40 = 20,453.50 : x
  2. Step 2: Convert to fraction form
    70,372.99/105,566.40 = 20,453.50/x
  3. Step 3: Cross multiply
    70,372.99x = 105,566.40 × 20,453.50
  4. Step 4: Simplify right side
    70,372.99x = 2,159,202,362.40
  5. Step 5: Solve for x
    x = 2,159,202,362.40/70,372.99
  6. Step 6: Final answer
    x = 30,682.26

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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.