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Finding the Fourth Proportional to 125.91, 188.88 and 61.02

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Solution

The fourth proportional to 125.91, 188.88 and 61.02 is: 91.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.91 : 188.88 = 61.02 : x
  2. Step 2: Convert to fraction form
    125.91/188.88 = 61.02/x
  3. Step 3: Cross multiply
    125.91x = 188.88 × 61.02
  4. Step 4: Simplify right side
    125.91x = 11,525.46
  5. Step 5: Solve for x
    x = 11,525.46/125.91
  6. Step 6: Final answer
    x = 91.54

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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.