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Finding the Fourth Proportional to 71,338.80, 98,444.82 and 39,072.90

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Solution

The fourth proportional to 71,338.80, 98,444.82 and 39,072.90 is: 53,919.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,338.80 : 98,444.82 = 39,072.90 : x
  2. Step 2: Convert to fraction form
    71,338.80/98,444.82 = 39,072.90/x
  3. Step 3: Cross multiply
    71,338.80x = 98,444.82 × 39,072.90
  4. Step 4: Simplify right side
    71,338.80x = 3,846,524,607.38
  5. Step 5: Solve for x
    x = 3,846,524,607.38/71,338.80
  6. Step 6: Final answer
    x = 53,919.11

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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.