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Finding the Fourth Proportional to 114.79, 172.19 and 66.01

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Solution

The fourth proportional to 114.79, 172.19 and 66.01 is: 99.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.79 : 172.19 = 66.01 : x
  2. Step 2: Convert to fraction form
    114.79/172.19 = 66.01/x
  3. Step 3: Cross multiply
    114.79x = 172.19 × 66.01
  4. Step 4: Simplify right side
    114.79x = 11,366.26
  5. Step 5: Solve for x
    x = 11,366.26/114.79
  6. Step 6: Final answer
    x = 99.02

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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.