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Finding the Fourth Proportional to 58.86, 80.72 and 56.92

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Solution

The fourth proportional to 58.86, 80.72 and 56.92 is: 78.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.86 : 80.72 = 56.92 : x
  2. Step 2: Convert to fraction form
    58.86/80.72 = 56.92/x
  3. Step 3: Cross multiply
    58.86x = 80.72 × 56.92
  4. Step 4: Simplify right side
    58.86x = 4,594.58
  5. Step 5: Solve for x
    x = 4,594.58/58.86
  6. Step 6: Final answer
    x = 78.06

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.