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Finding the Fourth Proportional to 73.58, 100.98 and 70.61

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Solution

The fourth proportional to 73.58, 100.98 and 70.61 is: 96.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.58 : 100.98 = 70.61 : x
  2. Step 2: Convert to fraction form
    73.58/100.98 = 70.61/x
  3. Step 3: Cross multiply
    73.58x = 100.98 × 70.61
  4. Step 4: Simplify right side
    73.58x = 7,129.69
  5. Step 5: Solve for x
    x = 7,129.69/73.58
  6. Step 6: Final answer
    x = 96.90

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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.