Home / 257,085.09-385,537.32-77,116.86

Finding the Fourth Proportional to 257,085.09, 385,537.32 and 77,116.86

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Solution

The fourth proportional to 257,085.09, 385,537.32 and 77,116.86 is: 115,648.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,085.09 : 385,537.32 = 77,116.86 : x
  2. Step 2: Convert to fraction form
    257,085.09/385,537.32 = 77,116.86/x
  3. Step 3: Cross multiply
    257,085.09x = 385,537.32 × 77,116.86
  4. Step 4: Simplify right side
    257,085.09x = 29,731,427,531.22
  5. Step 5: Solve for x
    x = 29,731,427,531.22/257,085.09
  6. Step 6: Final answer
    x = 115,648.20

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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.