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Finding the Fourth Proportional to 70.79, 97.45 and 62.46

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Solution

The fourth proportional to 70.79, 97.45 and 62.46 is: 85.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.79 : 97.45 = 62.46 : x
  2. Step 2: Convert to fraction form
    70.79/97.45 = 62.46/x
  3. Step 3: Cross multiply
    70.79x = 97.45 × 62.46
  4. Step 4: Simplify right side
    70.79x = 6,087.01
  5. Step 5: Solve for x
    x = 6,087.01/70.79
  6. Step 6: Final answer
    x = 85.98

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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.