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Finding the Fourth Proportional to 139,123.44, 208,681.44 and 39,290.48

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Solution

The fourth proportional to 139,123.44, 208,681.44 and 39,290.48 is: 58,934.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,123.44 : 208,681.44 = 39,290.48 : x
  2. Step 2: Convert to fraction form
    139,123.44/208,681.44 = 39,290.48/x
  3. Step 3: Cross multiply
    139,123.44x = 208,681.44 × 39,290.48
  4. Step 4: Simplify right side
    139,123.44x = 8,199,193,944.69
  5. Step 5: Solve for x
    x = 8,199,193,944.69/139,123.44
  6. Step 6: Final answer
    x = 58,934.67

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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.