Home / 280,136.04-420,205.64-69,774

Finding the Fourth Proportional to 280,136.04, 420,205.64 and 69,774

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Solution

The fourth proportional to 280,136.04, 420,205.64 and 69,774 is: 104,661.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,136.04 : 420,205.64 = 69,774 : x
  2. Step 2: Convert to fraction form
    280,136.04/420,205.64 = 69,774/x
  3. Step 3: Cross multiply
    280,136.04x = 420,205.64 × 69,774
  4. Step 4: Simplify right side
    280,136.04x = 29,319,428,325.36
  5. Step 5: Solve for x
    x = 29,319,428,325.36/280,136.04
  6. Step 6: Final answer
    x = 104,661.39

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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.