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Finding the Fourth Proportional to 192,803.34, 266,078.79 and 121,156.86

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Solution

The fourth proportional to 192,803.34, 266,078.79 and 121,156.86 is: 167,202.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,803.34 : 266,078.79 = 121,156.86 : x
  2. Step 2: Convert to fraction form
    192,803.34/266,078.79 = 121,156.86/x
  3. Step 3: Cross multiply
    192,803.34x = 266,078.79 × 121,156.86
  4. Step 4: Simplify right side
    192,803.34x = 32,237,270,709.00
  5. Step 5: Solve for x
    x = 32,237,270,709.00/192,803.34
  6. Step 6: Final answer
    x = 167,202.86

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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.