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Finding the Fourth Proportional to 165.09, 247.59 and 56.91

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Solution

The fourth proportional to 165.09, 247.59 and 56.91 is: 85.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.09 : 247.59 = 56.91 : x
  2. Step 2: Convert to fraction form
    165.09/247.59 = 56.91/x
  3. Step 3: Cross multiply
    165.09x = 247.59 × 56.91
  4. Step 4: Simplify right side
    165.09x = 14,090.35
  5. Step 5: Solve for x
    x = 14,090.35/165.09
  6. Step 6: Final answer
    x = 85.35

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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.