Home / 129,172.26-178,263-72,583.50

Finding the Fourth Proportional to 129,172.26, 178,263 and 72,583.50

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Solution

The fourth proportional to 129,172.26, 178,263 and 72,583.50 is: 100,168.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,172.26 : 178,263 = 72,583.50 : x
  2. Step 2: Convert to fraction form
    129,172.26/178,263 = 72,583.50/x
  3. Step 3: Cross multiply
    129,172.26x = 178,263 × 72,583.50
  4. Step 4: Simplify right side
    129,172.26x = 12,938,952,460.50
  5. Step 5: Solve for x
    x = 12,938,952,460.50/129,172.26
  6. Step 6: Final answer
    x = 100,168.20

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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.