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Finding the Fourth Proportional to 72,493.08, 100,040.58 and 40,661.88

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Solution

The fourth proportional to 72,493.08, 100,040.58 and 40,661.88 is: 56,113.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,493.08 : 100,040.58 = 40,661.88 : x
  2. Step 2: Convert to fraction form
    72,493.08/100,040.58 = 40,661.88/x
  3. Step 3: Cross multiply
    72,493.08x = 100,040.58 × 40,661.88
  4. Step 4: Simplify right side
    72,493.08x = 4,067,838,059.09
  5. Step 5: Solve for x
    x = 4,067,838,059.09/72,493.08
  6. Step 6: Final answer
    x = 56,113.47

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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.