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Finding the Fourth Proportional to 216,455.80, 298,708.12 and 120,962.48

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Solution

The fourth proportional to 216,455.80, 298,708.12 and 120,962.48 is: 166,927.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,455.80 : 298,708.12 = 120,962.48 : x
  2. Step 2: Convert to fraction form
    216,455.80/298,708.12 = 120,962.48/x
  3. Step 3: Cross multiply
    216,455.80x = 298,708.12 × 120,962.48
  4. Step 4: Simplify right side
    216,455.80x = 36,132,474,991.34
  5. Step 5: Solve for x
    x = 36,132,474,991.34/216,455.80
  6. Step 6: Final answer
    x = 166,927.73

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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.