Home / 72,381.10-108,568.16-19,790.70

Finding the Fourth Proportional to 72,381.10, 108,568.16 and 19,790.70

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Solution

The fourth proportional to 72,381.10, 108,568.16 and 19,790.70 is: 29,685.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,381.10 : 108,568.16 = 19,790.70 : x
  2. Step 2: Convert to fraction form
    72,381.10/108,568.16 = 19,790.70/x
  3. Step 3: Cross multiply
    72,381.10x = 108,568.16 × 19,790.70
  4. Step 4: Simplify right side
    72,381.10x = 2,148,639,884.11
  5. Step 5: Solve for x
    x = 2,148,639,884.11/72,381.10
  6. Step 6: Final answer
    x = 29,685.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.