Home / 129,426.53-178,608.24-72,837.90

Finding the Fourth Proportional to 129,426.53, 178,608.24 and 72,837.90

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Solution

The fourth proportional to 129,426.53, 178,608.24 and 72,837.90 is: 100,516.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,426.53 : 178,608.24 = 72,837.90 : x
  2. Step 2: Convert to fraction form
    129,426.53/178,608.24 = 72,837.90/x
  3. Step 3: Cross multiply
    129,426.53x = 178,608.24 × 72,837.90
  4. Step 4: Simplify right side
    129,426.53x = 13,009,449,124.30
  5. Step 5: Solve for x
    x = 13,009,449,124.30/129,426.53
  6. Step 6: Final answer
    x = 100,516.10

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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.