Home / 427,880.75-641,922.35-139,690.85

Finding the Fourth Proportional to 427,880.75, 641,922.35 and 139,690.85

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Solution

The fourth proportional to 427,880.75, 641,922.35 and 139,690.85 is: 209,569.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,880.75 : 641,922.35 = 139,690.85 : x
  2. Step 2: Convert to fraction form
    427,880.75/641,922.35 = 139,690.85/x
  3. Step 3: Cross multiply
    427,880.75x = 641,922.35 × 139,690.85
  4. Step 4: Simplify right side
    427,880.75x = 89,670,679,611.85
  5. Step 5: Solve for x
    x = 89,670,679,611.85/427,880.75
  6. Step 6: Final answer
    x = 209,569.32

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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.