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Finding the Fourth Proportional to 139,810.35, 209,699.84 and 38,622.80

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Solution

The fourth proportional to 139,810.35, 209,699.84 and 38,622.80 is: 57,929.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,810.35 : 209,699.84 = 38,622.80 : x
  2. Step 2: Convert to fraction form
    139,810.35/209,699.84 = 38,622.80/x
  3. Step 3: Cross multiply
    139,810.35x = 209,699.84 × 38,622.80
  4. Step 4: Simplify right side
    139,810.35x = 8,099,193,738.74
  5. Step 5: Solve for x
    x = 8,099,193,738.74/139,810.35
  6. Step 6: Final answer
    x = 57,929.86

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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.