Home / 280,121.25-420,185.52-93,132.75

Finding the Fourth Proportional to 280,121.25, 420,185.52 and 93,132.75

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Solution

The fourth proportional to 280,121.25, 420,185.52 and 93,132.75 is: 139,700.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,121.25 : 420,185.52 = 93,132.75 : x
  2. Step 2: Convert to fraction form
    280,121.25/420,185.52 = 93,132.75/x
  3. Step 3: Cross multiply
    280,121.25x = 420,185.52 × 93,132.75
  4. Step 4: Simplify right side
    280,121.25x = 39,133,032,987.78
  5. Step 5: Solve for x
    x = 39,133,032,987.78/280,121.25
  6. Step 6: Final answer
    x = 139,700.34

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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.