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Finding the Fourth Proportional to 139,889.76, 193,041.81 and 79,460.22

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Solution

The fourth proportional to 139,889.76, 193,041.81 and 79,460.22 is: 109,651.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,889.76 : 193,041.81 = 79,460.22 : x
  2. Step 2: Convert to fraction form
    139,889.76/193,041.81 = 79,460.22/x
  3. Step 3: Cross multiply
    139,889.76x = 193,041.81 × 79,460.22
  4. Step 4: Simplify right side
    139,889.76x = 15,339,144,691.80
  5. Step 5: Solve for x
    x = 15,339,144,691.80/139,889.76
  6. Step 6: Final answer
    x = 109,651.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.