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Finding the Fourth Proportional to 243,338.75, 364,768.23 and 85,456.49

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Solution

The fourth proportional to 243,338.75, 364,768.23 and 85,456.49 is: 128,100.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,338.75 : 364,768.23 = 85,456.49 : x
  2. Step 2: Convert to fraction form
    243,338.75/364,768.23 = 85,456.49/x
  3. Step 3: Cross multiply
    243,338.75x = 364,768.23 × 85,456.49
  4. Step 4: Simplify right side
    243,338.75x = 31,171,810,775.47
  5. Step 5: Solve for x
    x = 31,171,810,775.47/243,338.75
  6. Step 6: Final answer
    x = 128,100.48

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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.