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Finding the Fourth Proportional to 51.93, 78.02 and 45.33

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Solution

The fourth proportional to 51.93, 78.02 and 45.33 is: 68.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.93 : 78.02 = 45.33 : x
  2. Step 2: Convert to fraction form
    51.93/78.02 = 45.33/x
  3. Step 3: Cross multiply
    51.93x = 78.02 × 45.33
  4. Step 4: Simplify right side
    51.93x = 3,536.65
  5. Step 5: Solve for x
    x = 3,536.65/51.93
  6. Step 6: Final answer
    x = 68.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.