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Finding the Fourth Proportional to 212,017.44, 318,064.56 and 87,290.40

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Solution

The fourth proportional to 212,017.44, 318,064.56 and 87,290.40 is: 130,951.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,017.44 : 318,064.56 = 87,290.40 : x
  2. Step 2: Convert to fraction form
    212,017.44/318,064.56 = 87,290.40/x
  3. Step 3: Cross multiply
    212,017.44x = 318,064.56 × 87,290.40
  4. Step 4: Simplify right side
    212,017.44x = 27,763,982,668.22
  5. Step 5: Solve for x
    x = 27,763,982,668.22/212,017.44
  6. Step 6: Final answer
    x = 130,951.41

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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.