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Finding the Fourth Proportional to 58.47, 81.10 and 55.95

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Solution

The fourth proportional to 58.47, 81.10 and 55.95 is: 77.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.47 : 81.10 = 55.95 : x
  2. Step 2: Convert to fraction form
    58.47/81.10 = 55.95/x
  3. Step 3: Cross multiply
    58.47x = 81.10 × 55.95
  4. Step 4: Simplify right side
    58.47x = 4,537.41
  5. Step 5: Solve for x
    x = 4,537.41/58.47
  6. Step 6: Final answer
    x = 77.60

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.