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Finding the Fourth Proportional to 215,697.90, 323,738.85 and 126,840.30

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Solution

The fourth proportional to 215,697.90, 323,738.85 and 126,840.30 is: 190,373.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,697.90 : 323,738.85 = 126,840.30 : x
  2. Step 2: Convert to fraction form
    215,697.90/323,738.85 = 126,840.30/x
  3. Step 3: Cross multiply
    215,697.90x = 323,738.85 × 126,840.30
  4. Step 4: Simplify right side
    215,697.90x = 41,063,132,855.66
  5. Step 5: Solve for x
    x = 41,063,132,855.66/215,697.90
  6. Step 6: Final answer
    x = 190,373.35

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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.