Home / 212,821.81-319,232.71-72,581.65

Finding the Fourth Proportional to 212,821.81, 319,232.71 and 72,581.65

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Solution

The fourth proportional to 212,821.81, 319,232.71 and 72,581.65 is: 108,872.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,821.81 : 319,232.71 = 72,581.65 : x
  2. Step 2: Convert to fraction form
    212,821.81/319,232.71 = 72,581.65/x
  3. Step 3: Cross multiply
    212,821.81x = 319,232.71 × 72,581.65
  4. Step 4: Simplify right side
    212,821.81x = 23,170,435,048.15
  5. Step 5: Solve for x
    x = 23,170,435,048.15/212,821.81
  6. Step 6: Final answer
    x = 108,872.47

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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.