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Finding the Fourth Proportional to 215,999.40, 323,999.10 and 136,684.20

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Solution

The fourth proportional to 215,999.40, 323,999.10 and 136,684.20 is: 205,026.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,999.40 : 323,999.10 = 136,684.20 : x
  2. Step 2: Convert to fraction form
    215,999.40/323,999.10 = 136,684.20/x
  3. Step 3: Cross multiply
    215,999.40x = 323,999.10 × 136,684.20
  4. Step 4: Simplify right side
    215,999.40x = 44,285,557,784.22
  5. Step 5: Solve for x
    x = 44,285,557,784.22/215,999.40
  6. Step 6: Final answer
    x = 205,026.30

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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.