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Finding the Fourth Proportional to 78,576.99, 117,853.97 and 25,987.23

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Solution

The fourth proportional to 78,576.99, 117,853.97 and 25,987.23 is: 38,977.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,576.99 : 117,853.97 = 25,987.23 : x
  2. Step 2: Convert to fraction form
    78,576.99/117,853.97 = 25,987.23/x
  3. Step 3: Cross multiply
    78,576.99x = 117,853.97 × 25,987.23
  4. Step 4: Simplify right side
    78,576.99x = 3,062,698,094.87
  5. Step 5: Solve for x
    x = 3,062,698,094.87/78,576.99
  6. Step 6: Final answer
    x = 38,977.04

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Double scale
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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.