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Finding the Fourth Proportional to 71,018.65, 98,005.64 and 39,187.54

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Solution

The fourth proportional to 71,018.65, 98,005.64 and 39,187.54 is: 54,078.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,018.65 : 98,005.64 = 39,187.54 : x
  2. Step 2: Convert to fraction form
    71,018.65/98,005.64 = 39,187.54/x
  3. Step 3: Cross multiply
    71,018.65x = 98,005.64 × 39,187.54
  4. Step 4: Simplify right side
    71,018.65x = 3,840,599,937.73
  5. Step 5: Solve for x
    x = 3,840,599,937.73/71,018.65
  6. Step 6: Final answer
    x = 54,078.75

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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.