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Finding the Fourth Proportional to 125.79, 187.89 and 98.46

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Solution

The fourth proportional to 125.79, 187.89 and 98.46 is: 147.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.79 : 187.89 = 98.46 : x
  2. Step 2: Convert to fraction form
    125.79/187.89 = 98.46/x
  3. Step 3: Cross multiply
    125.79x = 187.89 × 98.46
  4. Step 4: Simplify right side
    125.79x = 18,499.65
  5. Step 5: Solve for x
    x = 18,499.65/125.79
  6. Step 6: Final answer
    x = 147.07

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.