Home / 129,492.32-178,696.62-72,131.42

Finding the Fourth Proportional to 129,492.32, 178,696.62 and 72,131.42

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Solution

The fourth proportional to 129,492.32, 178,696.62 and 72,131.42 is: 99,539.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,492.32 : 178,696.62 = 72,131.42 : x
  2. Step 2: Convert to fraction form
    129,492.32/178,696.62 = 72,131.42/x
  3. Step 3: Cross multiply
    129,492.32x = 178,696.62 × 72,131.42
  4. Step 4: Simplify right side
    129,492.32x = 12,889,640,949.80
  5. Step 5: Solve for x
    x = 12,889,640,949.80/129,492.32
  6. Step 6: Final answer
    x = 99,539.81

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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.