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Finding the Fourth Proportional to 210,101.22, 315,154.56 and 69,859.84

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Solution

The fourth proportional to 210,101.22, 315,154.56 and 69,859.84 is: 104,790.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,101.22 : 315,154.56 = 69,859.84 : x
  2. Step 2: Convert to fraction form
    210,101.22/315,154.56 = 69,859.84/x
  3. Step 3: Cross multiply
    210,101.22x = 315,154.56 × 69,859.84
  4. Step 4: Simplify right side
    210,101.22x = 22,016,647,136.87
  5. Step 5: Solve for x
    x = 22,016,647,136.87/210,101.22
  6. Step 6: Final answer
    x = 104,790.67

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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.