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Finding the Fourth Proportional to 73.08, 108.99 and 70.45

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Solution

The fourth proportional to 73.08, 108.99 and 70.45 is: 105.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.08 : 108.99 = 70.45 : x
  2. Step 2: Convert to fraction form
    73.08/108.99 = 70.45/x
  3. Step 3: Cross multiply
    73.08x = 108.99 × 70.45
  4. Step 4: Simplify right side
    73.08x = 7,678.35
  5. Step 5: Solve for x
    x = 7,678.35/73.08
  6. Step 6: Final answer
    x = 105.07

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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.