Home / 219,018.67-302,310.40-128,394.25

Finding the Fourth Proportional to 219,018.67, 302,310.40 and 128,394.25

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Solution

The fourth proportional to 219,018.67, 302,310.40 and 128,394.25 is: 177,221.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,018.67 : 302,310.40 = 128,394.25 : x
  2. Step 2: Convert to fraction form
    219,018.67/302,310.40 = 128,394.25/x
  3. Step 3: Cross multiply
    219,018.67x = 302,310.40 × 128,394.25
  4. Step 4: Simplify right side
    219,018.67x = 38,814,915,998.44
  5. Step 5: Solve for x
    x = 38,814,915,998.44/219,018.67
  6. Step 6: Final answer
    x = 177,221.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.