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Finding the Fourth Proportional to 128.01, 192.04 and 36.71

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Solution

The fourth proportional to 128.01, 192.04 and 36.71 is: 55.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128.01 : 192.04 = 36.71 : x
  2. Step 2: Convert to fraction form
    128.01/192.04 = 36.71/x
  3. Step 3: Cross multiply
    128.01x = 192.04 × 36.71
  4. Step 4: Simplify right side
    128.01x = 7,050.02
  5. Step 5: Solve for x
    x = 7,050.02/128.01
  6. Step 6: Final answer
    x = 55.08

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