Home / 219,145.19-328,520.41-78,805.13

Finding the Fourth Proportional to 219,145.19, 328,520.41 and 78,805.13

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Solution

The fourth proportional to 219,145.19, 328,520.41 and 78,805.13 is: 118,136.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,145.19 : 328,520.41 = 78,805.13 : x
  2. Step 2: Convert to fraction form
    219,145.19/328,520.41 = 78,805.13/x
  3. Step 3: Cross multiply
    219,145.19x = 328,520.41 × 78,805.13
  4. Step 4: Simplify right side
    219,145.19x = 25,889,091,778.09
  5. Step 5: Solve for x
    x = 25,889,091,778.09/219,145.19
  6. Step 6: Final answer
    x = 118,136.71

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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.