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Finding the Fourth Proportional to 208,022.80, 312,142.20 and 97,214.80

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Solution

The fourth proportional to 208,022.80, 312,142.20 and 97,214.80 is: 145,872.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,022.80 : 312,142.20 = 97,214.80 : x
  2. Step 2: Convert to fraction form
    208,022.80/312,142.20 = 97,214.80/x
  3. Step 3: Cross multiply
    208,022.80x = 312,142.20 × 97,214.80
  4. Step 4: Simplify right side
    208,022.80x = 30,344,841,544.56
  5. Step 5: Solve for x
    x = 30,344,841,544.56/208,022.80
  6. Step 6: Final answer
    x = 145,872.67

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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.