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Finding the Fourth Proportional to 139,900.44, 209,880.65 and 45,136.02

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Solution

The fourth proportional to 139,900.44, 209,880.65 and 45,136.02 is: 67,713.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,900.44 : 209,880.65 = 45,136.02 : x
  2. Step 2: Convert to fraction form
    139,900.44/209,880.65 = 45,136.02/x
  3. Step 3: Cross multiply
    139,900.44x = 209,880.65 × 45,136.02
  4. Step 4: Simplify right side
    139,900.44x = 9,473,176,990.33
  5. Step 5: Solve for x
    x = 9,473,176,990.33/139,900.44
  6. Step 6: Final answer
    x = 67,713.70

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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.