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Finding the Fourth Proportional to 73.61, 109.80 and 65.41

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Solution

The fourth proportional to 73.61, 109.80 and 65.41 is: 97.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.61 : 109.80 = 65.41 : x
  2. Step 2: Convert to fraction form
    73.61/109.80 = 65.41/x
  3. Step 3: Cross multiply
    73.61x = 109.80 × 65.41
  4. Step 4: Simplify right side
    73.61x = 7,182.02
  5. Step 5: Solve for x
    x = 7,182.02/73.61
  6. Step 6: Final answer
    x = 97.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.