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Finding the Fourth Proportional to 141,343.80, 212,015.70 and 139,270.20

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Solution

The fourth proportional to 141,343.80, 212,015.70 and 139,270.20 is: 208,905.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,343.80 : 212,015.70 = 139,270.20 : x
  2. Step 2: Convert to fraction form
    141,343.80/212,015.70 = 139,270.20/x
  3. Step 3: Cross multiply
    141,343.80x = 212,015.70 × 139,270.20
  4. Step 4: Simplify right side
    141,343.80x = 29,527,468,942.14
  5. Step 5: Solve for x
    x = 29,527,468,942.14/141,343.80
  6. Step 6: Final answer
    x = 208,905.30

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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.