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Finding the Fourth Proportional to 70.50, 97.28 and 45.98

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Solution

The fourth proportional to 70.50, 97.28 and 45.98 is: 63.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.50 : 97.28 = 45.98 : x
  2. Step 2: Convert to fraction form
    70.50/97.28 = 45.98/x
  3. Step 3: Cross multiply
    70.50x = 97.28 × 45.98
  4. Step 4: Simplify right side
    70.50x = 4,472.70
  5. Step 5: Solve for x
    x = 4,472.70/70.50
  6. Step 6: Final answer
    x = 63.45

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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.