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Finding the Fourth Proportional to 139,420.98, 208,584.03 and 107,590.56

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Solution

The fourth proportional to 139,420.98, 208,584.03 and 107,590.56 is: 160,963.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,420.98 : 208,584.03 = 107,590.56 : x
  2. Step 2: Convert to fraction form
    139,420.98/208,584.03 = 107,590.56/x
  3. Step 3: Cross multiply
    139,420.98x = 208,584.03 × 107,590.56
  4. Step 4: Simplify right side
    139,420.98x = 22,441,672,784.12
  5. Step 5: Solve for x
    x = 22,441,672,784.12/139,420.98
  6. Step 6: Final answer
    x = 160,963.38

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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.