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Finding the Fourth Proportional to 53.61, 74.00 and 43.76

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Solution

The fourth proportional to 53.61, 74.00 and 43.76 is: 60.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.61 : 74.00 = 43.76 : x
  2. Step 2: Convert to fraction form
    53.61/74.00 = 43.76/x
  3. Step 3: Cross multiply
    53.61x = 74.00 × 43.76
  4. Step 4: Simplify right side
    53.61x = 3,237.65
  5. Step 5: Solve for x
    x = 3,237.65/53.61
  6. Step 6: Final answer
    x = 60.39

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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.