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Finding the Fourth Proportional to 65.99, 90.96 and 49.59

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Solution

The fourth proportional to 65.99, 90.96 and 49.59 is: 68.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.99 : 90.96 = 49.59 : x
  2. Step 2: Convert to fraction form
    65.99/90.96 = 49.59/x
  3. Step 3: Cross multiply
    65.99x = 90.96 × 49.59
  4. Step 4: Simplify right side
    65.99x = 4,510.46
  5. Step 5: Solve for x
    x = 4,510.46/65.99
  6. Step 6: Final answer
    x = 68.35

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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.