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Finding the Fourth Proportional to 123,417.80, 184,658.70 and 81,945.80

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Solution

The fourth proportional to 123,417.80, 184,658.70 and 81,945.80 is: 122,607.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,417.80 : 184,658.70 = 81,945.80 : x
  2. Step 2: Convert to fraction form
    123,417.80/184,658.70 = 81,945.80/x
  3. Step 3: Cross multiply
    123,417.80x = 184,658.70 × 81,945.80
  4. Step 4: Simplify right side
    123,417.80x = 15,132,004,898.46
  5. Step 5: Solve for x
    x = 15,132,004,898.46/123,417.80
  6. Step 6: Final answer
    x = 122,607.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.