Home / 78,255.36-117,120.60-64,214.82

Finding the Fourth Proportional to 78,255.36, 117,120.60 and 64,214.82

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Solution

The fourth proportional to 78,255.36, 117,120.60 and 64,214.82 is: 96,106.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,255.36 : 117,120.60 = 64,214.82 : x
  2. Step 2: Convert to fraction form
    78,255.36/117,120.60 = 64,214.82/x
  3. Step 3: Cross multiply
    78,255.36x = 117,120.60 × 64,214.82
  4. Step 4: Simplify right side
    78,255.36x = 7,520,878,247.29
  5. Step 5: Solve for x
    x = 7,520,878,247.29/78,255.36
  6. Step 6: Final answer
    x = 96,106.88

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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.