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Finding the Fourth Proportional to 68.04, 93.15 and 66.18

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Solution

The fourth proportional to 68.04, 93.15 and 66.18 is: 90.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.04 : 93.15 = 66.18 : x
  2. Step 2: Convert to fraction form
    68.04/93.15 = 66.18/x
  3. Step 3: Cross multiply
    68.04x = 93.15 × 66.18
  4. Step 4: Simplify right side
    68.04x = 6,164.67
  5. Step 5: Solve for x
    x = 6,164.67/68.04
  6. Step 6: Final answer
    x = 90.60

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.