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Finding the Fourth Proportional to 130.02, 193.32 and 121.38

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Solution

The fourth proportional to 130.02, 193.32 and 121.38 is: 180.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.02 : 193.32 = 121.38 : x
  2. Step 2: Convert to fraction form
    130.02/193.32 = 121.38/x
  3. Step 3: Cross multiply
    130.02x = 193.32 × 121.38
  4. Step 4: Simplify right side
    130.02x = 23,465.18
  5. Step 5: Solve for x
    x = 23,465.18/130.02
  6. Step 6: Final answer
    x = 180.47

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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.