Home / 209,090.36-313,536.72-81,066.62

Finding the Fourth Proportional to 209,090.36, 313,536.72 and 81,066.62

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Solution

The fourth proportional to 209,090.36, 313,536.72 and 81,066.62 is: 121,561.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,090.36 : 313,536.72 = 81,066.62 : x
  2. Step 2: Convert to fraction form
    209,090.36/313,536.72 = 81,066.62/x
  3. Step 3: Cross multiply
    209,090.36x = 313,536.72 × 81,066.62
  4. Step 4: Simplify right side
    209,090.36x = 25,417,362,136.29
  5. Step 5: Solve for x
    x = 25,417,362,136.29/209,090.36
  6. Step 6: Final answer
    x = 121,561.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.