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Finding the Fourth Proportional to 139,559, 210,269.18 and 126,247.48

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Solution

The fourth proportional to 139,559, 210,269.18 and 126,247.48 is: 190,213.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,559 : 210,269.18 = 126,247.48 : x
  2. Step 2: Convert to fraction form
    139,559/210,269.18 = 126,247.48/x
  3. Step 3: Cross multiply
    139,559x = 210,269.18 × 126,247.48
  4. Step 4: Simplify right side
    139,559x = 26,545,954,096.67
  5. Step 5: Solve for x
    x = 26,545,954,096.67/139,559
  6. Step 6: Final answer
    x = 190,213.13

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.