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Finding the Fourth Proportional to 114.01, 157.30 and 87.81

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Solution

The fourth proportional to 114.01, 157.30 and 87.81 is: 121.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.01 : 157.30 = 87.81 : x
  2. Step 2: Convert to fraction form
    114.01/157.30 = 87.81/x
  3. Step 3: Cross multiply
    114.01x = 157.30 × 87.81
  4. Step 4: Simplify right side
    114.01x = 13,812.51
  5. Step 5: Solve for x
    x = 13,812.51/114.01
  6. Step 6: Final answer
    x = 121.15

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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.