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Finding the Fourth Proportional to 139,083.39, 208,710.74 and 54,829.21

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Solution

The fourth proportional to 139,083.39, 208,710.74 and 54,829.21 is: 82,277.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,083.39 : 208,710.74 = 54,829.21 : x
  2. Step 2: Convert to fraction form
    139,083.39/208,710.74 = 54,829.21/x
  3. Step 3: Cross multiply
    139,083.39x = 208,710.74 × 54,829.21
  4. Step 4: Simplify right side
    139,083.39x = 11,443,445,514.49
  5. Step 5: Solve for x
    x = 11,443,445,514.49/139,083.39
  6. Step 6: Final answer
    x = 82,277.59

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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.