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Finding the Fourth Proportional to 139,272.49, 208,446.63 and 126,821.17

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Solution

The fourth proportional to 139,272.49, 208,446.63 and 126,821.17 is: 189,810.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,272.49 : 208,446.63 = 126,821.17 : x
  2. Step 2: Convert to fraction form
    139,272.49/208,446.63 = 126,821.17/x
  3. Step 3: Cross multiply
    139,272.49x = 208,446.63 × 126,821.17
  4. Step 4: Simplify right side
    139,272.49x = 26,435,445,499.16
  5. Step 5: Solve for x
    x = 26,435,445,499.16/139,272.49
  6. Step 6: Final answer
    x = 189,810.96

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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.