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Finding the Fourth Proportional to 139,148.38, 208,752.81 and 45,650.62

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Solution

The fourth proportional to 139,148.38, 208,752.81 and 45,650.62 is: 68,485.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,148.38 : 208,752.81 = 45,650.62 : x
  2. Step 2: Convert to fraction form
    139,148.38/208,752.81 = 45,650.62/x
  3. Step 3: Cross multiply
    139,148.38x = 208,752.81 × 45,650.62
  4. Step 4: Simplify right side
    139,148.38x = 9,529,695,203.24
  5. Step 5: Solve for x
    x = 9,529,695,203.24/139,148.38
  6. Step 6: Final answer
    x = 68,485.85

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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.