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Finding the Fourth Proportional to 125.23, 172.77 and 99.00

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Solution

The fourth proportional to 125.23, 172.77 and 99.00 is: 136.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.23 : 172.77 = 99.00 : x
  2. Step 2: Convert to fraction form
    125.23/172.77 = 99.00/x
  3. Step 3: Cross multiply
    125.23x = 172.77 × 99.00
  4. Step 4: Simplify right side
    125.23x = 17,105.18
  5. Step 5: Solve for x
    x = 17,105.18/125.23
  6. Step 6: Final answer
    x = 136.59

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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.