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Finding the Fourth Proportional to 257,028.80, 385,600.80 and 99,243.20

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Solution

The fourth proportional to 257,028.80, 385,600.80 and 99,243.20 is: 148,887.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,028.80 : 385,600.80 = 99,243.20 : x
  2. Step 2: Convert to fraction form
    257,028.80/385,600.80 = 99,243.20/x
  3. Step 3: Cross multiply
    257,028.80x = 385,600.80 × 99,243.20
  4. Step 4: Simplify right side
    257,028.80x = 38,268,257,314.56
  5. Step 5: Solve for x
    x = 38,268,257,314.56/257,028.80
  6. Step 6: Final answer
    x = 148,887.04

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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.