Home / 129,314.13-178,453.52-72,725.50

Finding the Fourth Proportional to 129,314.13, 178,453.52 and 72,725.50

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Solution

The fourth proportional to 129,314.13, 178,453.52 and 72,725.50 is: 100,361.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,314.13 : 178,453.52 = 72,725.50 : x
  2. Step 2: Convert to fraction form
    129,314.13/178,453.52 = 72,725.50/x
  3. Step 3: Cross multiply
    129,314.13x = 178,453.52 × 72,725.50
  4. Step 4: Simplify right side
    129,314.13x = 12,978,121,468.76
  5. Step 5: Solve for x
    x = 12,978,121,468.76/129,314.13
  6. Step 6: Final answer
    x = 100,361.20

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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.