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Finding the Fourth Proportional to 53.59, 74.01 and 39.12

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Solution

The fourth proportional to 53.59, 74.01 and 39.12 is: 54.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.59 : 74.01 = 39.12 : x
  2. Step 2: Convert to fraction form
    53.59/74.01 = 39.12/x
  3. Step 3: Cross multiply
    53.59x = 74.01 × 39.12
  4. Step 4: Simplify right side
    53.59x = 2,895.27
  5. Step 5: Solve for x
    x = 2,895.27/53.59
  6. Step 6: Final answer
    x = 54.03

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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.