Home / 210,839.09-290,957.81-115,345.80

Finding the Fourth Proportional to 210,839.09, 290,957.81 and 115,345.80

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Solution

The fourth proportional to 210,839.09, 290,957.81 and 115,345.80 is: 159,177.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,839.09 : 290,957.81 = 115,345.80 : x
  2. Step 2: Convert to fraction form
    210,839.09/290,957.81 = 115,345.80/x
  3. Step 3: Cross multiply
    210,839.09x = 290,957.81 × 115,345.80
  4. Step 4: Simplify right side
    210,839.09x = 33,560,760,783.97
  5. Step 5: Solve for x
    x = 33,560,760,783.97/210,839.09
  6. Step 6: Final answer
    x = 159,177.13

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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.