Home / 212,218.62-318,328.30-70,071.84

Finding the Fourth Proportional to 212,218.62, 318,328.30 and 70,071.84

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Solution

The fourth proportional to 212,218.62, 318,328.30 and 70,071.84 is: 105,107.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,218.62 : 318,328.30 = 70,071.84 : x
  2. Step 2: Convert to fraction form
    212,218.62/318,328.30 = 70,071.84/x
  3. Step 3: Cross multiply
    212,218.62x = 318,328.30 × 70,071.84
  4. Step 4: Simplify right side
    212,218.62x = 22,305,849,705.07
  5. Step 5: Solve for x
    x = 22,305,849,705.07/212,218.62
  6. Step 6: Final answer
    x = 105,107.88

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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.