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Finding the Fourth Proportional to 139,415.16, 210,173.16 and 130,395

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Solution

The fourth proportional to 139,415.16, 210,173.16 and 130,395 is: 196,574.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,415.16 : 210,173.16 = 130,395 : x
  2. Step 2: Convert to fraction form
    139,415.16/210,173.16 = 130,395/x
  3. Step 3: Cross multiply
    139,415.16x = 210,173.16 × 130,395
  4. Step 4: Simplify right side
    139,415.16x = 27,405,529,198.20
  5. Step 5: Solve for x
    x = 27,405,529,198.20/139,415.16
  6. Step 6: Final answer
    x = 196,574.96

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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.