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Finding the Fourth Proportional to 70.99, 98.01 and 53.55

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Solution

The fourth proportional to 70.99, 98.01 and 53.55 is: 73.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.99 : 98.01 = 53.55 : x
  2. Step 2: Convert to fraction form
    70.99/98.01 = 53.55/x
  3. Step 3: Cross multiply
    70.99x = 98.01 × 53.55
  4. Step 4: Simplify right side
    70.99x = 5,248.09
  5. Step 5: Solve for x
    x = 5,248.09/70.99
  6. Step 6: Final answer
    x = 73.93

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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.