Home / 207,918.16-286,930.80-121,939.16

Finding the Fourth Proportional to 207,918.16, 286,930.80 and 121,939.16

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Solution

The fourth proportional to 207,918.16, 286,930.80 and 121,939.16 is: 168,278.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,918.16 : 286,930.80 = 121,939.16 : x
  2. Step 2: Convert to fraction form
    207,918.16/286,930.80 = 121,939.16/x
  3. Step 3: Cross multiply
    207,918.16x = 286,930.80 × 121,939.16
  4. Step 4: Simplify right side
    207,918.16x = 34,988,100,730.13
  5. Step 5: Solve for x
    x = 34,988,100,730.13/207,918.16
  6. Step 6: Final answer
    x = 168,278.23

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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.