Home / 212,423.20-318,634.80-64,679.20

Finding the Fourth Proportional to 212,423.20, 318,634.80 and 64,679.20

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Solution

The fourth proportional to 212,423.20, 318,634.80 and 64,679.20 is: 97,018.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,423.20 : 318,634.80 = 64,679.20 : x
  2. Step 2: Convert to fraction form
    212,423.20/318,634.80 = 64,679.20/x
  3. Step 3: Cross multiply
    212,423.20x = 318,634.80 × 64,679.20
  4. Step 4: Simplify right side
    212,423.20x = 20,609,043,956.16
  5. Step 5: Solve for x
    x = 20,609,043,956.16/212,423.20
  6. Step 6: Final answer
    x = 97,018.80

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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.