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Finding the Fourth Proportional to 212,232.82, 318,275.37 and 79,040.40

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Solution

The fourth proportional to 212,232.82, 318,275.37 and 79,040.40 is: 118,533.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,232.82 : 318,275.37 = 79,040.40 : x
  2. Step 2: Convert to fraction form
    212,232.82/318,275.37 = 79,040.40/x
  3. Step 3: Cross multiply
    212,232.82x = 318,275.37 × 79,040.40
  4. Step 4: Simplify right side
    212,232.82x = 25,156,612,554.95
  5. Step 5: Solve for x
    x = 25,156,612,554.95/212,232.82
  6. Step 6: Final answer
    x = 118,533.09

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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.