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Finding the Fourth Proportional to 73,919.28, 102,008.70 and 40,385.28

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Solution

The fourth proportional to 73,919.28, 102,008.70 and 40,385.28 is: 55,731.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,919.28 : 102,008.70 = 40,385.28 : x
  2. Step 2: Convert to fraction form
    73,919.28/102,008.70 = 40,385.28/x
  3. Step 3: Cross multiply
    73,919.28x = 102,008.70 × 40,385.28
  4. Step 4: Simplify right side
    73,919.28x = 4,119,649,911.94
  5. Step 5: Solve for x
    x = 4,119,649,911.94/73,919.28
  6. Step 6: Final answer
    x = 55,731.74

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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.