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Finding the Fourth Proportional to 71,673.49, 98,903.34 and 39,406.38

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Solution

The fourth proportional to 71,673.49, 98,903.34 and 39,406.38 is: 54,377.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,673.49 : 98,903.34 = 39,406.38 : x
  2. Step 2: Convert to fraction form
    71,673.49/98,903.34 = 39,406.38/x
  3. Step 3: Cross multiply
    71,673.49x = 98,903.34 × 39,406.38
  4. Step 4: Simplify right side
    71,673.49x = 3,897,422,599.31
  5. Step 5: Solve for x
    x = 3,897,422,599.31/71,673.49
  6. Step 6: Final answer
    x = 54,377.46

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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.