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Finding the Fourth Proportional to 157.51, 235.95 and 118.81

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Solution

The fourth proportional to 157.51, 235.95 and 118.81 is: 177.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.51 : 235.95 = 118.81 : x
  2. Step 2: Convert to fraction form
    157.51/235.95 = 118.81/x
  3. Step 3: Cross multiply
    157.51x = 235.95 × 118.81
  4. Step 4: Simplify right side
    157.51x = 28,033.22
  5. Step 5: Solve for x
    x = 28,033.22/157.51
  6. Step 6: Final answer
    x = 177.98

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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.