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Finding the Fourth Proportional to 323,968.72, 485,987.64 and 136,999.12

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Solution

The fourth proportional to 323,968.72, 485,987.64 and 136,999.12 is: 205,513.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,968.72 : 485,987.64 = 136,999.12 : x
  2. Step 2: Convert to fraction form
    323,968.72/485,987.64 = 136,999.12/x
  3. Step 3: Cross multiply
    323,968.72x = 485,987.64 × 136,999.12
  4. Step 4: Simplify right side
    323,968.72x = 66,579,879,010.88
  5. Step 5: Solve for x
    x = 66,579,879,010.88/323,968.72
  6. Step 6: Final answer
    x = 205,513.29

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1.5x scale

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.