Home / 129,501.44-178,720.20-78,519.05

Finding the Fourth Proportional to 129,501.44, 178,720.20 and 78,519.05

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Solution

The fourth proportional to 129,501.44, 178,720.20 and 78,519.05 is: 108,361.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,501.44 : 178,720.20 = 78,519.05 : x
  2. Step 2: Convert to fraction form
    129,501.44/178,720.20 = 78,519.05/x
  3. Step 3: Cross multiply
    129,501.44x = 178,720.20 × 78,519.05
  4. Step 4: Simplify right side
    129,501.44x = 14,032,939,426.21
  5. Step 5: Solve for x
    x = 14,032,939,426.21/129,501.44
  6. Step 6: Final answer
    x = 108,361.27

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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.