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Finding the Fourth Proportional to 86.01, 118.77 and 56.51

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Solution

The fourth proportional to 86.01, 118.77 and 56.51 is: 78.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.01 : 118.77 = 56.51 : x
  2. Step 2: Convert to fraction form
    86.01/118.77 = 56.51/x
  3. Step 3: Cross multiply
    86.01x = 118.77 × 56.51
  4. Step 4: Simplify right side
    86.01x = 6,711.69
  5. Step 5: Solve for x
    x = 6,711.69/86.01
  6. Step 6: Final answer
    x = 78.03

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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.