Home / 219,023.36-328,660.32-85,915.52

Finding the Fourth Proportional to 219,023.36, 328,660.32 and 85,915.52

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Solution

The fourth proportional to 219,023.36, 328,660.32 and 85,915.52 is: 128,922.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,023.36 : 328,660.32 = 85,915.52 : x
  2. Step 2: Convert to fraction form
    219,023.36/328,660.32 = 85,915.52/x
  3. Step 3: Cross multiply
    219,023.36x = 328,660.32 × 85,915.52
  4. Step 4: Simplify right side
    219,023.36x = 28,237,022,296.17
  5. Step 5: Solve for x
    x = 28,237,022,296.17/219,023.36
  6. Step 6: Final answer
    x = 128,922.42

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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.