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Finding the Fourth Proportional to 73.04, 100.78 and 51.23

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Solution

The fourth proportional to 73.04, 100.78 and 51.23 is: 70.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.04 : 100.78 = 51.23 : x
  2. Step 2: Convert to fraction form
    73.04/100.78 = 51.23/x
  3. Step 3: Cross multiply
    73.04x = 100.78 × 51.23
  4. Step 4: Simplify right side
    73.04x = 5,163.08
  5. Step 5: Solve for x
    x = 5,163.08/73.04
  6. Step 6: Final answer
    x = 70.69

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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.