Home / 210,815.03-315,715.84-120,584.21

Finding the Fourth Proportional to 210,815.03, 315,715.84 and 120,584.21

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Solution

The fourth proportional to 210,815.03, 315,715.84 and 120,584.21 is: 180,586.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,815.03 : 315,715.84 = 120,584.21 : x
  2. Step 2: Convert to fraction form
    210,815.03/315,715.84 = 120,584.21/x
  3. Step 3: Cross multiply
    210,815.03x = 315,715.84 × 120,584.21
  4. Step 4: Simplify right side
    210,815.03x = 38,070,343,270.85
  5. Step 5: Solve for x
    x = 38,070,343,270.85/210,815.03
  6. Step 6: Final answer
    x = 180,586.47

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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.