Home / 280,128.50-420,196.39-93,140

Finding the Fourth Proportional to 280,128.50, 420,196.39 and 93,140

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Solution

The fourth proportional to 280,128.50, 420,196.39 and 93,140 is: 139,711.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,128.50 : 420,196.39 = 93,140 : x
  2. Step 2: Convert to fraction form
    280,128.50/420,196.39 = 93,140/x
  3. Step 3: Cross multiply
    280,128.50x = 420,196.39 × 93,140
  4. Step 4: Simplify right side
    280,128.50x = 39,137,091,764.60
  5. Step 5: Solve for x
    x = 39,137,091,764.60/280,128.50
  6. Step 6: Final answer
    x = 139,711.21

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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.