Home / 257,087.10-385,540.32-77,118.86

Finding the Fourth Proportional to 257,087.10, 385,540.32 and 77,118.86

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Solution

The fourth proportional to 257,087.10, 385,540.32 and 77,118.86 is: 115,651.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,087.10 : 385,540.32 = 77,118.86 : x
  2. Step 2: Convert to fraction form
    257,087.10/385,540.32 = 77,118.86/x
  3. Step 3: Cross multiply
    257,087.10x = 385,540.32 × 77,118.86
  4. Step 4: Simplify right side
    257,087.10x = 29,732,429,962.44
  5. Step 5: Solve for x
    x = 29,732,429,962.44/257,087.10
  6. Step 6: Final answer
    x = 115,651.19

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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.