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Finding the Fourth Proportional to 139,529.44, 209,289.45 and 60,643.67

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Solution

The fourth proportional to 139,529.44, 209,289.45 and 60,643.67 is: 90,963.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,529.44 : 209,289.45 = 60,643.67 : x
  2. Step 2: Convert to fraction form
    139,529.44/209,289.45 = 60,643.67/x
  3. Step 3: Cross multiply
    139,529.44x = 209,289.45 × 60,643.67
  4. Step 4: Simplify right side
    139,529.44x = 12,692,080,340.28
  5. Step 5: Solve for x
    x = 12,692,080,340.28/139,529.44
  6. Step 6: Final answer
    x = 90,963.46

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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.