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Finding the Fourth Proportional to 217,683.99, 300,398.28 and 120,885.40

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Solution

The fourth proportional to 217,683.99, 300,398.28 and 120,885.40 is: 166,818.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,683.99 : 300,398.28 = 120,885.40 : x
  2. Step 2: Convert to fraction form
    217,683.99/300,398.28 = 120,885.40/x
  3. Step 3: Cross multiply
    217,683.99x = 300,398.28 × 120,885.40
  4. Step 4: Simplify right side
    217,683.99x = 36,313,766,237.11
  5. Step 5: Solve for x
    x = 36,313,766,237.11/217,683.99
  6. Step 6: Final answer
    x = 166,818.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.