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Finding the Fourth Proportional to 212,700.08, 318,749.40 and 117,972

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Solution

The fourth proportional to 212,700.08, 318,749.40 and 117,972 is: 176,791.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,700.08 : 318,749.40 = 117,972 : x
  2. Step 2: Convert to fraction form
    212,700.08/318,749.40 = 117,972/x
  3. Step 3: Cross multiply
    212,700.08x = 318,749.40 × 117,972
  4. Step 4: Simplify right side
    212,700.08x = 37,603,504,216.80
  5. Step 5: Solve for x
    x = 37,603,504,216.80/212,700.08
  6. Step 6: Final answer
    x = 176,791.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.