Home / 129,293.78-178,424.25-72,705.56

Finding the Fourth Proportional to 129,293.78, 178,424.25 and 72,705.56

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Solution

The fourth proportional to 129,293.78, 178,424.25 and 72,705.56 is: 100,333.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,293.78 : 178,424.25 = 72,705.56 : x
  2. Step 2: Convert to fraction form
    129,293.78/178,424.25 = 72,705.56/x
  3. Step 3: Cross multiply
    129,293.78x = 178,424.25 × 72,705.56
  4. Step 4: Simplify right side
    129,293.78x = 12,972,435,013.83
  5. Step 5: Solve for x
    x = 12,972,435,013.83/129,293.78
  6. Step 6: Final answer
    x = 100,333.02

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1.5x scale

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.