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Finding the Fourth Proportional to 72,700.73, 100,335.98 and 40,868.94

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Solution

The fourth proportional to 72,700.73, 100,335.98 and 40,868.94 is: 56,404.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,700.73 : 100,335.98 = 40,868.94 : x
  2. Step 2: Convert to fraction form
    72,700.73/100,335.98 = 40,868.94/x
  3. Step 3: Cross multiply
    72,700.73x = 100,335.98 × 40,868.94
  4. Step 4: Simplify right side
    72,700.73x = 4,100,624,942.12
  5. Step 5: Solve for x
    x = 4,100,624,942.12/72,700.73
  6. Step 6: Final answer
    x = 56,404.18

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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.