Home / 210,024.06-289,855.41-128,400.12

Finding the Fourth Proportional to 210,024.06, 289,855.41 and 128,400.12

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Solution

The fourth proportional to 210,024.06, 289,855.41 and 128,400.12 is: 177,205.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,024.06 : 289,855.41 = 128,400.12 : x
  2. Step 2: Convert to fraction form
    210,024.06/289,855.41 = 128,400.12/x
  3. Step 3: Cross multiply
    210,024.06x = 289,855.41 × 128,400.12
  4. Step 4: Simplify right side
    210,024.06x = 37,217,469,426.65
  5. Step 5: Solve for x
    x = 37,217,469,426.65/210,024.06
  6. Step 6: Final answer
    x = 177,205.74

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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.