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Finding the Fourth Proportional to 184.03, 253.81 and 128.70

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Solution

The fourth proportional to 184.03, 253.81 and 128.70 is: 177.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    184.03 : 253.81 = 128.70 : x
  2. Step 2: Convert to fraction form
    184.03/253.81 = 128.70/x
  3. Step 3: Cross multiply
    184.03x = 253.81 × 128.70
  4. Step 4: Simplify right side
    184.03x = 32,665.35
  5. Step 5: Solve for x
    x = 32,665.35/184.03
  6. Step 6: Final answer
    x = 177.50

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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.