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Finding the Fourth Proportional to 139,523.28, 209,284.44 and 38,321.43

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Solution

The fourth proportional to 139,523.28, 209,284.44 and 38,321.43 is: 57,482.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,523.28 : 209,284.44 = 38,321.43 : x
  2. Step 2: Convert to fraction form
    139,523.28/209,284.44 = 38,321.43/x
  3. Step 3: Cross multiply
    139,523.28x = 209,284.44 × 38,321.43
  4. Step 4: Simplify right side
    139,523.28x = 8,020,079,017.55
  5. Step 5: Solve for x
    x = 8,020,079,017.55/139,523.28
  6. Step 6: Final answer
    x = 57,482.01

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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.