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Finding the Fourth Proportional to 70.49, 97.14 and 56.62

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Solution

The fourth proportional to 70.49, 97.14 and 56.62 is: 78.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.49 : 97.14 = 56.62 : x
  2. Step 2: Convert to fraction form
    70.49/97.14 = 56.62/x
  3. Step 3: Cross multiply
    70.49x = 97.14 × 56.62
  4. Step 4: Simplify right side
    70.49x = 5,499.58
  5. Step 5: Solve for x
    x = 5,499.58/70.49
  6. Step 6: Final answer
    x = 78.02

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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.