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Finding the Fourth Proportional to 77,987.52, 116,991 and 25,382.88

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Solution

The fourth proportional to 77,987.52, 116,991 and 25,382.88 is: 38,077.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,987.52 : 116,991 = 25,382.88 : x
  2. Step 2: Convert to fraction form
    77,987.52/116,991 = 25,382.88/x
  3. Step 3: Cross multiply
    77,987.52x = 116,991 × 25,382.88
  4. Step 4: Simplify right side
    77,987.52x = 2,969,568,514.08
  5. Step 5: Solve for x
    x = 2,969,568,514.08/77,987.52
  6. Step 6: Final answer
    x = 38,077.48

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1.5x scale

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.