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Finding the Fourth Proportional to 257,130.72, 385,797.62 and 79,651.58

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Solution

The fourth proportional to 257,130.72, 385,797.62 and 79,651.58 is: 119,508.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,130.72 : 385,797.62 = 79,651.58 : x
  2. Step 2: Convert to fraction form
    257,130.72/385,797.62 = 79,651.58/x
  3. Step 3: Cross multiply
    257,130.72x = 385,797.62 × 79,651.58
  4. Step 4: Simplify right side
    257,130.72x = 30,729,388,263.38
  5. Step 5: Solve for x
    x = 30,729,388,263.38/257,130.72
  6. Step 6: Final answer
    x = 119,508.82

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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.