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Finding the Fourth Proportional to 70.43, 97.20 and 50.77

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Solution

The fourth proportional to 70.43, 97.20 and 50.77 is: 70.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.43 : 97.20 = 50.77 : x
  2. Step 2: Convert to fraction form
    70.43/97.20 = 50.77/x
  3. Step 3: Cross multiply
    70.43x = 97.20 × 50.77
  4. Step 4: Simplify right side
    70.43x = 4,934.84
  5. Step 5: Solve for x
    x = 4,934.84/70.43
  6. Step 6: Final answer
    x = 70.07

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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.