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Finding the Fourth Proportional to 139,184.73, 208,591.20 and 72,485.01

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Solution

The fourth proportional to 139,184.73, 208,591.20 and 72,485.01 is: 108,630.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,184.73 : 208,591.20 = 72,485.01 : x
  2. Step 2: Convert to fraction form
    139,184.73/208,591.20 = 72,485.01/x
  3. Step 3: Cross multiply
    139,184.73x = 208,591.20 × 72,485.01
  4. Step 4: Simplify right side
    139,184.73x = 15,119,735,217.91
  5. Step 5: Solve for x
    x = 15,119,735,217.91/139,184.73
  6. Step 6: Final answer
    x = 108,630.70

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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.