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Finding the Fourth Proportional to 65.88, 99.20 and 59.84

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Solution

The fourth proportional to 65.88, 99.20 and 59.84 is: 90.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.88 : 99.20 = 59.84 : x
  2. Step 2: Convert to fraction form
    65.88/99.20 = 59.84/x
  3. Step 3: Cross multiply
    65.88x = 99.20 × 59.84
  4. Step 4: Simplify right side
    65.88x = 5,936.13
  5. Step 5: Solve for x
    x = 5,936.13/65.88
  6. Step 6: Final answer
    x = 90.11

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.