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Finding the Fourth Proportional to 139,939.80, 209,909.70 and 134,496.60

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Solution

The fourth proportional to 139,939.80, 209,909.70 and 134,496.60 is: 201,744.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,939.80 : 209,909.70 = 134,496.60 : x
  2. Step 2: Convert to fraction form
    139,939.80/209,909.70 = 134,496.60/x
  3. Step 3: Cross multiply
    139,939.80x = 209,909.70 × 134,496.60
  4. Step 4: Simplify right side
    139,939.80x = 28,232,140,957.02
  5. Step 5: Solve for x
    x = 28,232,140,957.02/139,939.80
  6. Step 6: Final answer
    x = 201,744.90

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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.