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Finding the Fourth Proportional to 139,809.85, 209,699.08 and 38,622.30

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Solution

The fourth proportional to 139,809.85, 209,699.08 and 38,622.30 is: 57,929.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,809.85 : 209,699.08 = 38,622.30 : x
  2. Step 2: Convert to fraction form
    139,809.85/209,699.08 = 38,622.30/x
  3. Step 3: Cross multiply
    139,809.85x = 209,699.08 × 38,622.30
  4. Step 4: Simplify right side
    139,809.85x = 8,099,060,777.48
  5. Step 5: Solve for x
    x = 8,099,060,777.48/139,809.85
  6. Step 6: Final answer
    x = 57,929.11

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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.