Home / 129,578.46-178,814.25-72,988.62

Finding the Fourth Proportional to 129,578.46, 178,814.25 and 72,988.62

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Solution

The fourth proportional to 129,578.46, 178,814.25 and 72,988.62 is: 100,722.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,578.46 : 178,814.25 = 72,988.62 : x
  2. Step 2: Convert to fraction form
    129,578.46/178,814.25 = 72,988.62/x
  3. Step 3: Cross multiply
    129,578.46x = 178,814.25 × 72,988.62
  4. Step 4: Simplify right side
    129,578.46x = 13,051,405,343.84
  5. Step 5: Solve for x
    x = 13,051,405,343.84/129,578.46
  6. Step 6: Final answer
    x = 100,722.03

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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.