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Finding the Fourth Proportional to 72,497.98, 100,040.49 and 40,660.72

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Solution

The fourth proportional to 72,497.98, 100,040.49 and 40,660.72 is: 56,108.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,497.98 : 100,040.49 = 40,660.72 : x
  2. Step 2: Convert to fraction form
    72,497.98/100,040.49 = 40,660.72/x
  3. Step 3: Cross multiply
    72,497.98x = 100,040.49 × 40,660.72
  4. Step 4: Simplify right side
    72,497.98x = 4,067,718,352.55
  5. Step 5: Solve for x
    x = 4,067,718,352.55/72,497.98
  6. Step 6: Final answer
    x = 56,108.02

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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.