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Finding the Fourth Proportional to 139,808.85, 209,697.59 and 38,621.30

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Solution

The fourth proportional to 139,808.85, 209,697.59 and 38,621.30 is: 57,927.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,808.85 : 209,697.59 = 38,621.30 : x
  2. Step 2: Convert to fraction form
    139,808.85/209,697.59 = 38,621.30/x
  3. Step 3: Cross multiply
    139,808.85x = 209,697.59 × 38,621.30
  4. Step 4: Simplify right side
    139,808.85x = 8,098,792,291.07
  5. Step 5: Solve for x
    x = 8,098,792,291.07/139,808.85
  6. Step 6: Final answer
    x = 57,927.61

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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.