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Finding the Fourth Proportional to 187.68, 259.03 and 117.80

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Solution

The fourth proportional to 187.68, 259.03 and 117.80 is: 162.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.68 : 259.03 = 117.80 : x
  2. Step 2: Convert to fraction form
    187.68/259.03 = 117.80/x
  3. Step 3: Cross multiply
    187.68x = 259.03 × 117.80
  4. Step 4: Simplify right side
    187.68x = 30,515.01
  5. Step 5: Solve for x
    x = 30,515.01/187.68
  6. Step 6: Final answer
    x = 162.59

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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.