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Finding the Fourth Proportional to 115.16, 172.62 and 61.04

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Solution

The fourth proportional to 115.16, 172.62 and 61.04 is: 91.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.16 : 172.62 = 61.04 : x
  2. Step 2: Convert to fraction form
    115.16/172.62 = 61.04/x
  3. Step 3: Cross multiply
    115.16x = 172.62 × 61.04
  4. Step 4: Simplify right side
    115.16x = 10,536.72
  5. Step 5: Solve for x
    x = 10,536.72/115.16
  6. Step 6: Final answer
    x = 91.50

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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.