Home / 128,834.76-177,792.21-71,472.35

Finding the Fourth Proportional to 128,834.76, 177,792.21 and 71,472.35

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Solution

The fourth proportional to 128,834.76, 177,792.21 and 71,472.35 is: 98,631.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,834.76 : 177,792.21 = 71,472.35 : x
  2. Step 2: Convert to fraction form
    128,834.76/177,792.21 = 71,472.35/x
  3. Step 3: Cross multiply
    128,834.76x = 177,792.21 × 71,472.35
  4. Step 4: Simplify right side
    128,834.76x = 12,707,226,171.43
  5. Step 5: Solve for x
    x = 12,707,226,171.43/128,834.76
  6. Step 6: Final answer
    x = 98,631.97

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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.