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Finding the Fourth Proportional to 85.93, 118.61 and 53.23

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Solution

The fourth proportional to 85.93, 118.61 and 53.23 is: 73.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85.93 : 118.61 = 53.23 : x
  2. Step 2: Convert to fraction form
    85.93/118.61 = 53.23/x
  3. Step 3: Cross multiply
    85.93x = 118.61 × 53.23
  4. Step 4: Simplify right side
    85.93x = 6,313.61
  5. Step 5: Solve for x
    x = 6,313.61/85.93
  6. Step 6: Final answer
    x = 73.47

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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.