Home / 129,581.96-178,828.65-72,221.27

Finding the Fourth Proportional to 129,581.96, 178,828.65 and 72,221.27

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Solution

The fourth proportional to 129,581.96, 178,828.65 and 72,221.27 is: 99,668.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,581.96 : 178,828.65 = 72,221.27 : x
  2. Step 2: Convert to fraction form
    129,581.96/178,828.65 = 72,221.27/x
  3. Step 3: Cross multiply
    129,581.96x = 178,828.65 × 72,221.27
  4. Step 4: Simplify right side
    129,581.96x = 12,915,232,215.39
  5. Step 5: Solve for x
    x = 12,915,232,215.39/129,581.96
  6. Step 6: Final answer
    x = 99,668.44

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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.