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Finding the Fourth Proportional to 71,120.54, 98,146.03 and 39,289.45

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Solution

The fourth proportional to 71,120.54, 98,146.03 and 39,289.45 is: 54,219.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,120.54 : 98,146.03 = 39,289.45 : x
  2. Step 2: Convert to fraction form
    71,120.54/98,146.03 = 39,289.45/x
  3. Step 3: Cross multiply
    71,120.54x = 98,146.03 × 39,289.45
  4. Step 4: Simplify right side
    71,120.54x = 3,856,103,538.38
  5. Step 5: Solve for x
    x = 3,856,103,538.38/71,120.54
  6. Step 6: Final answer
    x = 54,219.27

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Double scale
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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.