Home / 71,217.54-98,279.10-39,385.71

Finding the Fourth Proportional to 71,217.54, 98,279.10 and 39,385.71

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Solution

The fourth proportional to 71,217.54, 98,279.10 and 39,385.71 is: 54,351.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,217.54 : 98,279.10 = 39,385.71 : x
  2. Step 2: Convert to fraction form
    71,217.54/98,279.10 = 39,385.71/x
  3. Step 3: Cross multiply
    71,217.54x = 98,279.10 × 39,385.71
  4. Step 4: Simplify right side
    71,217.54x = 3,870,792,131.66
  5. Step 5: Solve for x
    x = 3,870,792,131.66/71,217.54
  6. Step 6: Final answer
    x = 54,351.67

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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.