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Finding the Fourth Proportional to 123.01, 184.49 and 77.30

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Solution

The fourth proportional to 123.01, 184.49 and 77.30 is: 115.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.01 : 184.49 = 77.30 : x
  2. Step 2: Convert to fraction form
    123.01/184.49 = 77.30/x
  3. Step 3: Cross multiply
    123.01x = 184.49 × 77.30
  4. Step 4: Simplify right side
    123.01x = 14,259.77
  5. Step 5: Solve for x
    x = 14,259.77/123.01
  6. Step 6: Final answer
    x = 115.93

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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.