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Finding the Fourth Proportional to 212,622.40, 293,375.64 and 161,621.56

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Solution

The fourth proportional to 212,622.40, 293,375.64 and 161,621.56 is: 223,004.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,622.40 : 293,375.64 = 161,621.56 : x
  2. Step 2: Convert to fraction form
    212,622.40/293,375.64 = 161,621.56/x
  3. Step 3: Cross multiply
    212,622.40x = 293,375.64 × 161,621.56
  4. Step 4: Simplify right side
    212,622.40x = 47,415,828,602.80
  5. Step 5: Solve for x
    x = 47,415,828,602.80/212,622.40
  6. Step 6: Final answer
    x = 223,004.86

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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.