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Finding the Fourth Proportional to 139,778.33, 209,708.36 and 45,006.41

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Solution

The fourth proportional to 139,778.33, 209,708.36 and 45,006.41 is: 67,522.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,778.33 : 209,708.36 = 45,006.41 : x
  2. Step 2: Convert to fraction form
    139,778.33/209,708.36 = 45,006.41/x
  3. Step 3: Cross multiply
    139,778.33x = 209,708.36 × 45,006.41
  4. Step 4: Simplify right side
    139,778.33x = 9,438,220,430.59
  5. Step 5: Solve for x
    x = 9,438,220,430.59/139,778.33
  6. Step 6: Final answer
    x = 67,522.77

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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.