Home / 129,336.32-178,482.30-72,747.56

Finding the Fourth Proportional to 129,336.32, 178,482.30 and 72,747.56

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Solution

The fourth proportional to 129,336.32, 178,482.30 and 72,747.56 is: 100,390.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,336.32 : 178,482.30 = 72,747.56 : x
  2. Step 2: Convert to fraction form
    129,336.32/178,482.30 = 72,747.56/x
  3. Step 3: Cross multiply
    129,336.32x = 178,482.30 × 72,747.56
  4. Step 4: Simplify right side
    129,336.32x = 12,984,152,001.59
  5. Step 5: Solve for x
    x = 12,984,152,001.59/129,336.32
  6. Step 6: Final answer
    x = 100,390.61

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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.