Home / 129,082.14-178,141.26-72,493.50

Finding the Fourth Proportional to 129,082.14, 178,141.26 and 72,493.50

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Solution

The fourth proportional to 129,082.14, 178,141.26 and 72,493.50 is: 100,045.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,082.14 : 178,141.26 = 72,493.50 : x
  2. Step 2: Convert to fraction form
    129,082.14/178,141.26 = 72,493.50/x
  3. Step 3: Cross multiply
    129,082.14x = 178,141.26 × 72,493.50
  4. Step 4: Simplify right side
    129,082.14x = 12,914,083,431.81
  5. Step 5: Solve for x
    x = 12,914,083,431.81/129,082.14
  6. Step 6: Final answer
    x = 100,045.47

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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.