Home / 212,287.26-318,315.51-105,436.80

Finding the Fourth Proportional to 212,287.26, 318,315.51 and 105,436.80

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Solution

The fourth proportional to 212,287.26, 318,315.51 and 105,436.80 is: 158,097.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,287.26 : 318,315.51 = 105,436.80 : x
  2. Step 2: Convert to fraction form
    212,287.26/318,315.51 = 105,436.80/x
  3. Step 3: Cross multiply
    212,287.26x = 318,315.51 × 105,436.80
  4. Step 4: Simplify right side
    212,287.26x = 33,562,168,764.77
  5. Step 5: Solve for x
    x = 33,562,168,764.77/212,287.26
  6. Step 6: Final answer
    x = 158,097.89

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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.