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Finding the Fourth Proportional to 71,690.08, 98,932.08 and 39,858.97

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Solution

The fourth proportional to 71,690.08, 98,932.08 and 39,858.97 is: 55,005.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,690.08 : 98,932.08 = 39,858.97 : x
  2. Step 2: Convert to fraction form
    71,690.08/98,932.08 = 39,858.97/x
  3. Step 3: Cross multiply
    71,690.08x = 98,932.08 × 39,858.97
  4. Step 4: Simplify right side
    71,690.08x = 3,943,330,808.76
  5. Step 5: Solve for x
    x = 3,943,330,808.76/71,690.08
  6. Step 6: Final answer
    x = 55,005.25

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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.