Home / 129,369.80-178,525.68-72,007.22

Finding the Fourth Proportional to 129,369.80, 178,525.68 and 72,007.22

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Solution

The fourth proportional to 129,369.80, 178,525.68 and 72,007.22 is: 99,367.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,369.80 : 178,525.68 = 72,007.22 : x
  2. Step 2: Convert to fraction form
    129,369.80/178,525.68 = 72,007.22/x
  3. Step 3: Cross multiply
    129,369.80x = 178,525.68 × 72,007.22
  4. Step 4: Simplify right side
    129,369.80x = 12,855,137,915.41
  5. Step 5: Solve for x
    x = 12,855,137,915.41/129,369.80
  6. Step 6: Final answer
    x = 99,367.38

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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.