Home / 257,065.11-385,613.97-79,557.21

Finding the Fourth Proportional to 257,065.11, 385,613.97 and 79,557.21

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Solution

The fourth proportional to 257,065.11, 385,613.97 and 79,557.21 is: 119,340.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,065.11 : 385,613.97 = 79,557.21 : x
  2. Step 2: Convert to fraction form
    257,065.11/385,613.97 = 79,557.21/x
  3. Step 3: Cross multiply
    257,065.11x = 385,613.97 × 79,557.21
  4. Step 4: Simplify right side
    257,065.11x = 30,678,371,590.22
  5. Step 5: Solve for x
    x = 30,678,371,590.22/257,065.11
  6. Step 6: Final answer
    x = 119,340.86

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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.