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Finding the Fourth Proportional to 130.47, 180.27 and 105.87

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Solution

The fourth proportional to 130.47, 180.27 and 105.87 is: 146.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.47 : 180.27 = 105.87 : x
  2. Step 2: Convert to fraction form
    130.47/180.27 = 105.87/x
  3. Step 3: Cross multiply
    130.47x = 180.27 × 105.87
  4. Step 4: Simplify right side
    130.47x = 19,085.18
  5. Step 5: Solve for x
    x = 19,085.18/130.47
  6. Step 6: Final answer
    x = 146.28

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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.