Home / 78,618.36-117,853.20-25,999.20

Finding the Fourth Proportional to 78,618.36, 117,853.20 and 25,999.20

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Solution

The fourth proportional to 78,618.36, 117,853.20 and 25,999.20 is: 38,974.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,618.36 : 117,853.20 = 25,999.20 : x
  2. Step 2: Convert to fraction form
    78,618.36/117,853.20 = 25,999.20/x
  3. Step 3: Cross multiply
    78,618.36x = 117,853.20 × 25,999.20
  4. Step 4: Simplify right side
    78,618.36x = 3,064,088,917.44
  5. Step 5: Solve for x
    x = 3,064,088,917.44/78,618.36
  6. Step 6: Final answer
    x = 38,974.22

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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.