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Finding the Fourth Proportional to 217,423.98, 300,063.42 and 121,948.74

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Solution

The fourth proportional to 217,423.98, 300,063.42 and 121,948.74 is: 168,299.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,423.98 : 300,063.42 = 121,948.74 : x
  2. Step 2: Convert to fraction form
    217,423.98/300,063.42 = 121,948.74/x
  3. Step 3: Cross multiply
    217,423.98x = 300,063.42 × 121,948.74
  4. Step 4: Simplify right side
    217,423.98x = 36,592,355,989.09
  5. Step 5: Solve for x
    x = 36,592,355,989.09/217,423.98
  6. Step 6: Final answer
    x = 168,299.54

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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.