Home / 129,381.26-178,544.31-72,792.50

Finding the Fourth Proportional to 129,381.26, 178,544.31 and 72,792.50

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Solution

The fourth proportional to 129,381.26, 178,544.31 and 72,792.50 is: 100,452.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,381.26 : 178,544.31 = 72,792.50 : x
  2. Step 2: Convert to fraction form
    129,381.26/178,544.31 = 72,792.50/x
  3. Step 3: Cross multiply
    129,381.26x = 178,544.31 × 72,792.50
  4. Step 4: Simplify right side
    129,381.26x = 12,996,686,685.68
  5. Step 5: Solve for x
    x = 12,996,686,685.68/129,381.26
  6. Step 6: Final answer
    x = 100,452.62

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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.