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Finding the Fourth Proportional to 70,371.99, 105,564.90 and 20,452.50

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Solution

The fourth proportional to 70,371.99, 105,564.90 and 20,452.50 is: 30,680.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,371.99 : 105,564.90 = 20,452.50 : x
  2. Step 2: Convert to fraction form
    70,371.99/105,564.90 = 20,452.50/x
  3. Step 3: Cross multiply
    70,371.99x = 105,564.90 × 20,452.50
  4. Step 4: Simplify right side
    70,371.99x = 2,159,066,117.25
  5. Step 5: Solve for x
    x = 2,159,066,117.25/70,371.99
  6. Step 6: Final answer
    x = 30,680.76

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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.