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Finding the Fourth Proportional to 217,388.87, 299,996.36 and 120,607.40

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Solution

The fourth proportional to 217,388.87, 299,996.36 and 120,607.40 is: 166,438.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,388.87 : 299,996.36 = 120,607.40 : x
  2. Step 2: Convert to fraction form
    217,388.87/299,996.36 = 120,607.40/x
  3. Step 3: Cross multiply
    217,388.87x = 299,996.36 × 120,607.40
  4. Step 4: Simplify right side
    217,388.87x = 36,181,778,886.05
  5. Step 5: Solve for x
    x = 36,181,778,886.05/217,388.87
  6. Step 6: Final answer
    x = 166,438.05

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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.