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Finding the Fourth Proportional to 139,154.54, 208,601.93 and 54,915.39

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Solution

The fourth proportional to 139,154.54, 208,601.93 and 54,915.39 is: 82,321.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,154.54 : 208,601.93 = 54,915.39 : x
  2. Step 2: Convert to fraction form
    139,154.54/208,601.93 = 54,915.39/x
  3. Step 3: Cross multiply
    139,154.54x = 208,601.93 × 54,915.39
  4. Step 4: Simplify right side
    139,154.54x = 11,455,456,066.13
  5. Step 5: Solve for x
    x = 11,455,456,066.13/139,154.54
  6. Step 6: Final answer
    x = 82,321.83

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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.