Home / 261,157.02-391,735.66-172,389.78

Finding the Fourth Proportional to 261,157.02, 391,735.66 and 172,389.78

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Solution

The fourth proportional to 261,157.02, 391,735.66 and 172,389.78 is: 258,584.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,157.02 : 391,735.66 = 172,389.78 : x
  2. Step 2: Convert to fraction form
    261,157.02/391,735.66 = 172,389.78/x
  3. Step 3: Cross multiply
    261,157.02x = 391,735.66 × 172,389.78
  4. Step 4: Simplify right side
    261,157.02x = 67,531,224,245.55
  5. Step 5: Solve for x
    x = 67,531,224,245.55/261,157.02
  6. Step 6: Final answer
    x = 258,584.76

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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.