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Finding the Fourth Proportional to 53.61, 74.01 and 39.03

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Solution

The fourth proportional to 53.61, 74.01 and 39.03 is: 53.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.61 : 74.01 = 39.03 : x
  2. Step 2: Convert to fraction form
    53.61/74.01 = 39.03/x
  3. Step 3: Cross multiply
    53.61x = 74.01 × 39.03
  4. Step 4: Simplify right side
    53.61x = 2,888.61
  5. Step 5: Solve for x
    x = 2,888.61/53.61
  6. Step 6: Final answer
    x = 53.88

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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.