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Finding the Fourth Proportional to 114.61, 158.20 and 65.51

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Solution

The fourth proportional to 114.61, 158.20 and 65.51 is: 90.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.61 : 158.20 = 65.51 : x
  2. Step 2: Convert to fraction form
    114.61/158.20 = 65.51/x
  3. Step 3: Cross multiply
    114.61x = 158.20 × 65.51
  4. Step 4: Simplify right side
    114.61x = 10,362.56
  5. Step 5: Solve for x
    x = 10,362.56/114.61
  6. Step 6: Final answer
    x = 90.41

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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.