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Finding the Fourth Proportional to 72,805.94, 100,475.43 and 40,976.90

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Solution

The fourth proportional to 72,805.94, 100,475.43 and 40,976.90 is: 56,549.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,805.94 : 100,475.43 = 40,976.90 : x
  2. Step 2: Convert to fraction form
    72,805.94/100,475.43 = 40,976.90/x
  3. Step 3: Cross multiply
    72,805.94x = 100,475.43 × 40,976.90
  4. Step 4: Simplify right side
    72,805.94x = 4,117,171,647.57
  5. Step 5: Solve for x
    x = 4,117,171,647.57/72,805.94
  6. Step 6: Final answer
    x = 56,549.94

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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.