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Finding the Fourth Proportional to 72,000, 99,359.73 and 40,167

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Solution

The fourth proportional to 72,000, 99,359.73 and 40,167 is: 55,430.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,000 : 99,359.73 = 40,167 : x
  2. Step 2: Convert to fraction form
    72,000/99,359.73 = 40,167/x
  3. Step 3: Cross multiply
    72,000x = 99,359.73 × 40,167
  4. Step 4: Simplify right side
    72,000x = 3,990,982,274.91
  5. Step 5: Solve for x
    x = 3,990,982,274.91/72,000
  6. Step 6: Final answer
    x = 55,430.31

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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.