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Finding the Fourth Proportional to 82.04, 112.50 and 73.80

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Solution

The fourth proportional to 82.04, 112.50 and 73.80 is: 101.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.04 : 112.50 = 73.80 : x
  2. Step 2: Convert to fraction form
    82.04/112.50 = 73.80/x
  3. Step 3: Cross multiply
    82.04x = 112.50 × 73.80
  4. Step 4: Simplify right side
    82.04x = 8,302.50
  5. Step 5: Solve for x
    x = 8,302.50/82.04
  6. Step 6: Final answer
    x = 101.21

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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.