Home / 129,433.76-178,589.04-72,824.48

Finding the Fourth Proportional to 129,433.76, 178,589.04 and 72,824.48

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Solution

The fourth proportional to 129,433.76, 178,589.04 and 72,824.48 is: 100,481.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,433.76 : 178,589.04 = 72,824.48 : x
  2. Step 2: Convert to fraction form
    129,433.76/178,589.04 = 72,824.48/x
  3. Step 3: Cross multiply
    129,433.76x = 178,589.04 × 72,824.48
  4. Step 4: Simplify right side
    129,433.76x = 13,005,653,971.70
  5. Step 5: Solve for x
    x = 13,005,653,971.70/129,433.76
  6. Step 6: Final answer
    x = 100,481.16

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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.