Home / 210,382.16-290,338.26-128,684.80

Finding the Fourth Proportional to 210,382.16, 290,338.26 and 128,684.80

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Solution

The fourth proportional to 210,382.16, 290,338.26 and 128,684.80 is: 177,591.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,382.16 : 290,338.26 = 128,684.80 : x
  2. Step 2: Convert to fraction form
    210,382.16/290,338.26 = 128,684.80/x
  3. Step 3: Cross multiply
    210,382.16x = 290,338.26 × 128,684.80
  4. Step 4: Simplify right side
    210,382.16x = 37,362,120,920.45
  5. Step 5: Solve for x
    x = 37,362,120,920.45/210,382.16
  6. Step 6: Final answer
    x = 177,591.68

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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.