Home / 72,638.84-100,236.20-40,813.04

Finding the Fourth Proportional to 72,638.84, 100,236.20 and 40,813.04

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Solution

The fourth proportional to 72,638.84, 100,236.20 and 40,813.04 is: 56,318.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,638.84 : 100,236.20 = 40,813.04 : x
  2. Step 2: Convert to fraction form
    72,638.84/100,236.20 = 40,813.04/x
  3. Step 3: Cross multiply
    72,638.84x = 100,236.20 × 40,813.04
  4. Step 4: Simplify right side
    72,638.84x = 4,090,944,040.05
  5. Step 5: Solve for x
    x = 4,090,944,040.05/72,638.84
  6. Step 6: Final answer
    x = 56,318.96

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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.