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Finding the Fourth Proportional to 103.60, 143.01 and 66.76

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Solution

The fourth proportional to 103.60, 143.01 and 66.76 is: 92.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.60 : 143.01 = 66.76 : x
  2. Step 2: Convert to fraction form
    103.60/143.01 = 66.76/x
  3. Step 3: Cross multiply
    103.60x = 143.01 × 66.76
  4. Step 4: Simplify right side
    103.60x = 9,547.35
  5. Step 5: Solve for x
    x = 9,547.35/103.60
  6. Step 6: Final answer
    x = 92.16

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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.