Home / 210,370.65-290,322.38-128,673.30

Finding the Fourth Proportional to 210,370.65, 290,322.38 and 128,673.30

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Solution

The fourth proportional to 210,370.65, 290,322.38 and 128,673.30 is: 177,575.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,370.65 : 290,322.38 = 128,673.30 : x
  2. Step 2: Convert to fraction form
    210,370.65/290,322.38 = 128,673.30/x
  3. Step 3: Cross multiply
    210,370.65x = 290,322.38 × 128,673.30
  4. Step 4: Simplify right side
    210,370.65x = 37,356,738,055.09
  5. Step 5: Solve for x
    x = 37,356,738,055.09/210,370.65
  6. Step 6: Final answer
    x = 177,575.81

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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.