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Finding the Fourth Proportional to 158.66, 218.75 and 123.63

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Solution

The fourth proportional to 158.66, 218.75 and 123.63 is: 170.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.66 : 218.75 = 123.63 : x
  2. Step 2: Convert to fraction form
    158.66/218.75 = 123.63/x
  3. Step 3: Cross multiply
    158.66x = 218.75 × 123.63
  4. Step 4: Simplify right side
    158.66x = 27,044.06
  5. Step 5: Solve for x
    x = 27,044.06/158.66
  6. Step 6: Final answer
    x = 170.45

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.