Home / 129,190.14-178,281.27-72,601.38

Finding the Fourth Proportional to 129,190.14, 178,281.27 and 72,601.38

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Solution

The fourth proportional to 129,190.14, 178,281.27 and 72,601.38 is: 100,189.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,190.14 : 178,281.27 = 72,601.38 : x
  2. Step 2: Convert to fraction form
    129,190.14/178,281.27 = 72,601.38/x
  3. Step 3: Cross multiply
    129,190.14x = 178,281.27 × 72,601.38
  4. Step 4: Simplify right side
    129,190.14x = 12,943,466,230.15
  5. Step 5: Solve for x
    x = 12,943,466,230.15/129,190.14
  6. Step 6: Final answer
    x = 100,189.27

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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.