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Finding the Fourth Proportional to 71,117.54, 98,141.90 and 39,286.45

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Solution

The fourth proportional to 71,117.54, 98,141.90 and 39,286.45 is: 54,215.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,117.54 : 98,141.90 = 39,286.45 : x
  2. Step 2: Convert to fraction form
    71,117.54/98,141.90 = 39,286.45/x
  3. Step 3: Cross multiply
    71,117.54x = 98,141.90 × 39,286.45
  4. Step 4: Simplify right side
    71,117.54x = 3,855,646,160.11
  5. Step 5: Solve for x
    x = 3,855,646,160.11/71,117.54
  6. Step 6: Final answer
    x = 54,215.12

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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.