Home / 129,256.14-178,353.96-72,656.58

Finding the Fourth Proportional to 129,256.14, 178,353.96 and 72,656.58

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Solution

The fourth proportional to 129,256.14, 178,353.96 and 72,656.58 is: 100,255.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,256.14 : 178,353.96 = 72,656.58 : x
  2. Step 2: Convert to fraction form
    129,256.14/178,353.96 = 72,656.58/x
  3. Step 3: Cross multiply
    129,256.14x = 178,353.96 × 72,656.58
  4. Step 4: Simplify right side
    129,256.14x = 12,958,588,763.06
  5. Step 5: Solve for x
    x = 12,958,588,763.06/129,256.14
  6. Step 6: Final answer
    x = 100,255.11

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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.