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Finding the Fourth Proportional to 72,684.66, 100,299.84 and 40,858.36

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Solution

The fourth proportional to 72,684.66, 100,299.84 and 40,858.36 is: 56,381.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,684.66 : 100,299.84 = 40,858.36 : x
  2. Step 2: Convert to fraction form
    72,684.66/100,299.84 = 40,858.36/x
  3. Step 3: Cross multiply
    72,684.66x = 100,299.84 × 40,858.36
  4. Step 4: Simplify right side
    72,684.66x = 4,098,086,970.66
  5. Step 5: Solve for x
    x = 4,098,086,970.66/72,684.66
  6. Step 6: Final answer
    x = 56,381.73

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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.