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Finding the Fourth Proportional to 50.79, 70.10 and 45.39

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Solution

The fourth proportional to 50.79, 70.10 and 45.39 is: 62.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.79 : 70.10 = 45.39 : x
  2. Step 2: Convert to fraction form
    50.79/70.10 = 45.39/x
  3. Step 3: Cross multiply
    50.79x = 70.10 × 45.39
  4. Step 4: Simplify right side
    50.79x = 3,181.60
  5. Step 5: Solve for x
    x = 3,181.60/50.79
  6. Step 6: Final answer
    x = 62.65

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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.