Home / 129,084.16-178,135.44-72,495.52

Finding the Fourth Proportional to 129,084.16, 178,135.44 and 72,495.52

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Solution

The fourth proportional to 129,084.16, 178,135.44 and 72,495.52 is: 100,043.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,084.16 : 178,135.44 = 72,495.52 : x
  2. Step 2: Convert to fraction form
    129,084.16/178,135.44 = 72,495.52/x
  3. Step 3: Cross multiply
    129,084.16x = 178,135.44 × 72,495.52
  4. Step 4: Simplify right side
    129,084.16x = 12,914,021,353.23
  5. Step 5: Solve for x
    x = 12,914,021,353.23/129,084.16
  6. Step 6: Final answer
    x = 100,043.42

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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.