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Finding the Fourth Proportional to 243,339, 364,768.60 and 85,456.73

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Solution

The fourth proportional to 243,339, 364,768.60 and 85,456.73 is: 128,100.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,339 : 364,768.60 = 85,456.73 : x
  2. Step 2: Convert to fraction form
    243,339/364,768.60 = 85,456.73/x
  3. Step 3: Cross multiply
    243,339x = 364,768.60 × 85,456.73
  4. Step 4: Simplify right side
    243,339x = 31,171,931,762.68
  5. Step 5: Solve for x
    x = 31,171,931,762.68/243,339
  6. Step 6: Final answer
    x = 128,100.85

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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.