Home / 219,480.30-302,867.10-128,839.95

Finding the Fourth Proportional to 219,480.30, 302,867.10 and 128,839.95

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Solution

The fourth proportional to 219,480.30, 302,867.10 and 128,839.95 is: 177,789.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,480.30 : 302,867.10 = 128,839.95 : x
  2. Step 2: Convert to fraction form
    219,480.30/302,867.10 = 128,839.95/x
  3. Step 3: Cross multiply
    219,480.30x = 302,867.10 × 128,839.95
  4. Step 4: Simplify right side
    219,480.30x = 39,021,382,020.65
  5. Step 5: Solve for x
    x = 39,021,382,020.65/219,480.30
  6. Step 6: Final answer
    x = 177,789.91

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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.