Home / 219,968.69-303,519.83-128,107.40

Finding the Fourth Proportional to 219,968.69, 303,519.83 and 128,107.40

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Solution

The fourth proportional to 219,968.69, 303,519.83 and 128,107.40 is: 176,766.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,968.69 : 303,519.83 = 128,107.40 : x
  2. Step 2: Convert to fraction form
    219,968.69/303,519.83 = 128,107.40/x
  3. Step 3: Cross multiply
    219,968.69x = 303,519.83 × 128,107.40
  4. Step 4: Simplify right side
    219,968.69x = 38,883,134,111.61
  5. Step 5: Solve for x
    x = 38,883,134,111.61/219,968.69
  6. Step 6: Final answer
    x = 176,766.68

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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.