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Finding the Fourth Proportional to 486,045, 729,105.66 and 131,053.68

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Solution

The fourth proportional to 486,045, 729,105.66 and 131,053.68 is: 196,590.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,045 : 729,105.66 = 131,053.68 : x
  2. Step 2: Convert to fraction form
    486,045/729,105.66 = 131,053.68/x
  3. Step 3: Cross multiply
    486,045x = 729,105.66 × 131,053.68
  4. Step 4: Simplify right side
    486,045x = 95,551,979,851.83
  5. Step 5: Solve for x
    x = 95,551,979,851.83/486,045
  6. Step 6: Final answer
    x = 196,590.81

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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.