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Finding the Fourth Proportional to 130.06, 194.27 and 128.98

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Solution

The fourth proportional to 130.06, 194.27 and 128.98 is: 192.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.06 : 194.27 = 128.98 : x
  2. Step 2: Convert to fraction form
    130.06/194.27 = 128.98/x
  3. Step 3: Cross multiply
    130.06x = 194.27 × 128.98
  4. Step 4: Simplify right side
    130.06x = 25,056.94
  5. Step 5: Solve for x
    x = 25,056.94/130.06
  6. Step 6: Final answer
    x = 192.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.