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Finding the Fourth Proportional to 139,989.58, 209,984.37 and 51,204.67

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Solution

The fourth proportional to 139,989.58, 209,984.37 and 51,204.67 is: 76,807.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,989.58 : 209,984.37 = 51,204.67 : x
  2. Step 2: Convert to fraction form
    139,989.58/209,984.37 = 51,204.67/x
  3. Step 3: Cross multiply
    139,989.58x = 209,984.37 × 51,204.67
  4. Step 4: Simplify right side
    139,989.58x = 10,752,180,371.01
  5. Step 5: Solve for x
    x = 10,752,180,371.01/139,989.58
  6. Step 6: Final answer
    x = 76,807.01

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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.