Home / 129,445.44-178,634.32-72,856.88

Finding the Fourth Proportional to 129,445.44, 178,634.32 and 72,856.88

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Solution

The fourth proportional to 129,445.44, 178,634.32 and 72,856.88 is: 100,542.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,445.44 : 178,634.32 = 72,856.88 : x
  2. Step 2: Convert to fraction form
    129,445.44/178,634.32 = 72,856.88/x
  3. Step 3: Cross multiply
    129,445.44x = 178,634.32 × 72,856.88
  4. Step 4: Simplify right side
    129,445.44x = 13,014,739,216.12
  5. Step 5: Solve for x
    x = 13,014,739,216.12/129,445.44
  6. Step 6: Final answer
    x = 100,542.28

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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.