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Finding the Fourth Proportional to 486,173.79, 729,260.66 and 131,187.81

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Solution

The fourth proportional to 486,173.79, 729,260.66 and 131,187.81 is: 196,781.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,173.79 : 729,260.66 = 131,187.81 : x
  2. Step 2: Convert to fraction form
    486,173.79/729,260.66 = 131,187.81/x
  3. Step 3: Cross multiply
    486,173.79x = 729,260.66 × 131,187.81
  4. Step 4: Simplify right side
    486,173.79x = 95,670,109,232.52
  5. Step 5: Solve for x
    x = 95,670,109,232.52/486,173.79
  6. Step 6: Final answer
    x = 196,781.71

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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.