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Finding the Fourth Proportional to 73,913.40, 102,002.86 and 40,379.40

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Solution

The fourth proportional to 73,913.40, 102,002.86 and 40,379.40 is: 55,724.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,913.40 : 102,002.86 = 40,379.40 : x
  2. Step 2: Convert to fraction form
    73,913.40/102,002.86 = 40,379.40/x
  3. Step 3: Cross multiply
    73,913.40x = 102,002.86 × 40,379.40
  4. Step 4: Simplify right side
    73,913.40x = 4,118,814,285.08
  5. Step 5: Solve for x
    x = 4,118,814,285.08/73,913.40
  6. Step 6: Final answer
    x = 55,724.87

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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.