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Finding the Fourth Proportional to 76.07, 113.98 and 56.93

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Solution

The fourth proportional to 76.07, 113.98 and 56.93 is: 85.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.07 : 113.98 = 56.93 : x
  2. Step 2: Convert to fraction form
    76.07/113.98 = 56.93/x
  3. Step 3: Cross multiply
    76.07x = 113.98 × 56.93
  4. Step 4: Simplify right side
    76.07x = 6,488.88
  5. Step 5: Solve for x
    x = 6,488.88/76.07
  6. Step 6: Final answer
    x = 85.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.