Home / 129,286.53-178,431.66-72,697.50

Finding the Fourth Proportional to 129,286.53, 178,431.66 and 72,697.50

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Solution

The fourth proportional to 129,286.53, 178,431.66 and 72,697.50 is: 100,331.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,286.53 : 178,431.66 = 72,697.50 : x
  2. Step 2: Convert to fraction form
    129,286.53/178,431.66 = 72,697.50/x
  3. Step 3: Cross multiply
    129,286.53x = 178,431.66 × 72,697.50
  4. Step 4: Simplify right side
    129,286.53x = 12,971,535,602.85
  5. Step 5: Solve for x
    x = 12,971,535,602.85/129,286.53
  6. Step 6: Final answer
    x = 100,331.69

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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.