Home / 261,161.02-391,741.66-172,393.78

Finding the Fourth Proportional to 261,161.02, 391,741.66 and 172,393.78

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Solution

The fourth proportional to 261,161.02, 391,741.66 and 172,393.78 is: 258,590.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,161.02 : 391,741.66 = 172,393.78 : x
  2. Step 2: Convert to fraction form
    261,161.02/391,741.66 = 172,393.78/x
  3. Step 3: Cross multiply
    261,161.02x = 391,741.66 × 172,393.78
  4. Step 4: Simplify right side
    261,161.02x = 67,533,825,550.87
  5. Step 5: Solve for x
    x = 67,533,825,550.87/261,161.02
  6. Step 6: Final answer
    x = 258,590.76

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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.