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Finding the Fourth Proportional to 111,163.80, 153,407.61 and 62,768.46

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Solution

The fourth proportional to 111,163.80, 153,407.61 and 62,768.46 is: 86,621.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,163.80 : 153,407.61 = 62,768.46 : x
  2. Step 2: Convert to fraction form
    111,163.80/153,407.61 = 62,768.46/x
  3. Step 3: Cross multiply
    111,163.80x = 153,407.61 × 62,768.46
  4. Step 4: Simplify right side
    111,163.80x = 9,629,159,431.98
  5. Step 5: Solve for x
    x = 9,629,159,431.98/111,163.80
  6. Step 6: Final answer
    x = 86,621.36

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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.