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Finding the Fourth Proportional to 169.04, 253.06 and 87.64

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Solution

The fourth proportional to 169.04, 253.06 and 87.64 is: 131.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.04 : 253.06 = 87.64 : x
  2. Step 2: Convert to fraction form
    169.04/253.06 = 87.64/x
  3. Step 3: Cross multiply
    169.04x = 253.06 × 87.64
  4. Step 4: Simplify right side
    169.04x = 22,178.18
  5. Step 5: Solve for x
    x = 22,178.18/169.04
  6. Step 6: Final answer
    x = 131.20

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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.