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Finding the Fourth Proportional to 219,683.70, 329,525.55 and 86,519.70

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Solution

The fourth proportional to 219,683.70, 329,525.55 and 86,519.70 is: 129,779.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,683.70 : 329,525.55 = 86,519.70 : x
  2. Step 2: Convert to fraction form
    219,683.70/329,525.55 = 86,519.70/x
  3. Step 3: Cross multiply
    219,683.70x = 329,525.55 × 86,519.70
  4. Step 4: Simplify right side
    219,683.70x = 28,510,451,728.34
  5. Step 5: Solve for x
    x = 28,510,451,728.34/219,683.70
  6. Step 6: Final answer
    x = 129,779.55

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1.5x scale

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.