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Finding the Fourth Proportional to 85.55, 117.99 and 56.01

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Solution

The fourth proportional to 85.55, 117.99 and 56.01 is: 77.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85.55 : 117.99 = 56.01 : x
  2. Step 2: Convert to fraction form
    85.55/117.99 = 56.01/x
  3. Step 3: Cross multiply
    85.55x = 117.99 × 56.01
  4. Step 4: Simplify right side
    85.55x = 6,608.62
  5. Step 5: Solve for x
    x = 6,608.62/85.55
  6. Step 6: Final answer
    x = 77.25

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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.