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Finding the Fourth Proportional to 139,419.72, 208,983.33 and 68,244.21

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Solution

The fourth proportional to 139,419.72, 208,983.33 and 68,244.21 is: 102,294.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,419.72 : 208,983.33 = 68,244.21 : x
  2. Step 2: Convert to fraction form
    139,419.72/208,983.33 = 68,244.21/x
  3. Step 3: Cross multiply
    139,419.72x = 208,983.33 × 68,244.21
  4. Step 4: Simplify right side
    139,419.72x = 14,261,902,259.02
  5. Step 5: Solve for x
    x = 14,261,902,259.02/139,419.72
  6. Step 6: Final answer
    x = 102,294.73

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1.5x scale

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.