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Finding the Fourth Proportional to 323,707.88, 485,758.65 and 136,719.38

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Solution

The fourth proportional to 323,707.88, 485,758.65 and 136,719.38 is: 205,162.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,707.88 : 485,758.65 = 136,719.38 : x
  2. Step 2: Convert to fraction form
    323,707.88/485,758.65 = 136,719.38/x
  3. Step 3: Cross multiply
    323,707.88x = 485,758.65 × 136,719.38
  4. Step 4: Simplify right side
    323,707.88x = 66,412,621,457.64
  5. Step 5: Solve for x
    x = 66,412,621,457.64/323,707.88
  6. Step 6: Final answer
    x = 205,162.20

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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.