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Finding the Fourth Proportional to 139,161.92, 208,774.72 and 60,289.28

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Solution

The fourth proportional to 139,161.92, 208,774.72 and 60,289.28 is: 90,447.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,161.92 : 208,774.72 = 60,289.28 : x
  2. Step 2: Convert to fraction form
    139,161.92/208,774.72 = 60,289.28/x
  3. Step 3: Cross multiply
    139,161.92x = 208,774.72 × 60,289.28
  4. Step 4: Simplify right side
    139,161.92x = 12,586,877,551.00
  5. Step 5: Solve for x
    x = 12,586,877,551.00/139,161.92
  6. Step 6: Final answer
    x = 90,447.71

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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.