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Finding the Fourth Proportional to 139,530.44, 209,290.95 and 60,644.67

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Solution

The fourth proportional to 139,530.44, 209,290.95 and 60,644.67 is: 90,964.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,530.44 : 209,290.95 = 60,644.67 : x
  2. Step 2: Convert to fraction form
    139,530.44/209,290.95 = 60,644.67/x
  3. Step 3: Cross multiply
    139,530.44x = 209,290.95 × 60,644.67
  4. Step 4: Simplify right side
    139,530.44x = 12,692,380,596.74
  5. Step 5: Solve for x
    x = 12,692,380,596.74/139,530.44
  6. Step 6: Final answer
    x = 90,964.96

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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.