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Finding the Fourth Proportional to 71,973, 107,990.76 and 38,654.28

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Solution

The fourth proportional to 71,973, 107,990.76 and 38,654.28 is: 57,998.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,973 : 107,990.76 = 38,654.28 : x
  2. Step 2: Convert to fraction form
    71,973/107,990.76 = 38,654.28/x
  3. Step 3: Cross multiply
    71,973x = 107,990.76 × 38,654.28
  4. Step 4: Simplify right side
    71,973x = 4,174,305,074.45
  5. Step 5: Solve for x
    x = 4,174,305,074.45/71,973
  6. Step 6: Final answer
    x = 57,998.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.