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Finding the Fourth Proportional to 257,118.73, 385,725.08 and 79,613.71

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Solution

The fourth proportional to 257,118.73, 385,725.08 and 79,613.71 is: 119,435.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,118.73 : 385,725.08 = 79,613.71 : x
  2. Step 2: Convert to fraction form
    257,118.73/385,725.08 = 79,613.71/x
  3. Step 3: Cross multiply
    257,118.73x = 385,725.08 × 79,613.71
  4. Step 4: Simplify right side
    257,118.73x = 30,709,003,893.57
  5. Step 5: Solve for x
    x = 30,709,003,893.57/257,118.73
  6. Step 6: Final answer
    x = 119,435.11

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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.