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Finding the Fourth Proportional to 74,797.92, 103,220.55 and 40,805.91

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Solution

The fourth proportional to 74,797.92, 103,220.55 and 40,805.91 is: 56,311.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,797.92 : 103,220.55 = 40,805.91 : x
  2. Step 2: Convert to fraction form
    74,797.92/103,220.55 = 40,805.91/x
  3. Step 3: Cross multiply
    74,797.92x = 103,220.55 × 40,805.91
  4. Step 4: Simplify right side
    74,797.92x = 4,212,008,473.45
  5. Step 5: Solve for x
    x = 4,212,008,473.45/74,797.92
  6. Step 6: Final answer
    x = 56,311.84

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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.