Home / 129,670.92-178,946.65-72,313.87

Finding the Fourth Proportional to 129,670.92, 178,946.65 and 72,313.87

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Solution

The fourth proportional to 129,670.92, 178,946.65 and 72,313.87 is: 99,793.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,670.92 : 178,946.65 = 72,313.87 : x
  2. Step 2: Convert to fraction form
    129,670.92/178,946.65 = 72,313.87/x
  3. Step 3: Cross multiply
    129,670.92x = 178,946.65 × 72,313.87
  4. Step 4: Simplify right side
    129,670.92x = 12,940,324,156.88
  5. Step 5: Solve for x
    x = 12,940,324,156.88/129,670.92
  6. Step 6: Final answer
    x = 99,793.57

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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.