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Finding the Fourth Proportional to 131.88, 179.58 and 129.98

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Solution

The fourth proportional to 131.88, 179.58 and 129.98 is: 176.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.88 : 179.58 = 129.98 : x
  2. Step 2: Convert to fraction form
    131.88/179.58 = 129.98/x
  3. Step 3: Cross multiply
    131.88x = 179.58 × 129.98
  4. Step 4: Simplify right side
    131.88x = 23,341.81
  5. Step 5: Solve for x
    x = 23,341.81/131.88
  6. Step 6: Final answer
    x = 176.99

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.