Home / 85,279.07-117,687-47,039.78

Finding the Fourth Proportional to 85,279.07, 117,687 and 47,039.78

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Solution

The fourth proportional to 85,279.07, 117,687 and 47,039.78 is: 64,915.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,279.07 : 117,687 = 47,039.78 : x
  2. Step 2: Convert to fraction form
    85,279.07/117,687 = 47,039.78/x
  3. Step 3: Cross multiply
    85,279.07x = 117,687 × 47,039.78
  4. Step 4: Simplify right side
    85,279.07x = 5,535,970,883.08
  5. Step 5: Solve for x
    x = 5,535,970,883.08/85,279.07
  6. Step 6: Final answer
    x = 64,915.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.