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Finding the Fourth Proportional to 130.71, 180.12 and 110.98

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Solution

The fourth proportional to 130.71, 180.12 and 110.98 is: 152.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.71 : 180.12 = 110.98 : x
  2. Step 2: Convert to fraction form
    130.71/180.12 = 110.98/x
  3. Step 3: Cross multiply
    130.71x = 180.12 × 110.98
  4. Step 4: Simplify right side
    130.71x = 19,989.72
  5. Step 5: Solve for x
    x = 19,989.72/130.71
  6. Step 6: Final answer
    x = 152.93

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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.