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Finding the Fourth Proportional to 51.94, 71.70 and 45.39

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Solution

The fourth proportional to 51.94, 71.70 and 45.39 is: 62.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.94 : 71.70 = 45.39 : x
  2. Step 2: Convert to fraction form
    51.94/71.70 = 45.39/x
  3. Step 3: Cross multiply
    51.94x = 71.70 × 45.39
  4. Step 4: Simplify right side
    51.94x = 3,254.46
  5. Step 5: Solve for x
    x = 3,254.46/51.94
  6. Step 6: Final answer
    x = 62.66

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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.