Home / 129,640.78-178,904.28-73,054.18

Finding the Fourth Proportional to 129,640.78, 178,904.28 and 73,054.18

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Solution

The fourth proportional to 129,640.78, 178,904.28 and 73,054.18 is: 100,814.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,640.78 : 178,904.28 = 73,054.18 : x
  2. Step 2: Convert to fraction form
    129,640.78/178,904.28 = 73,054.18/x
  3. Step 3: Cross multiply
    129,640.78x = 178,904.28 × 73,054.18
  4. Step 4: Simplify right side
    129,640.78x = 13,069,705,560.54
  5. Step 5: Solve for x
    x = 13,069,705,560.54/129,640.78
  6. Step 6: Final answer
    x = 100,814.77

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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.