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Finding the Fourth Proportional to 217,647.68, 300,353.80 and 122,154.38

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Solution

The fourth proportional to 217,647.68, 300,353.80 and 122,154.38 is: 168,573.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,647.68 : 300,353.80 = 122,154.38 : x
  2. Step 2: Convert to fraction form
    217,647.68/300,353.80 = 122,154.38/x
  3. Step 3: Cross multiply
    217,647.68x = 300,353.80 × 122,154.38
  4. Step 4: Simplify right side
    217,647.68x = 36,689,532,219.64
  5. Step 5: Solve for x
    x = 36,689,532,219.64/217,647.68
  6. Step 6: Final answer
    x = 168,573.05

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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.