Home / 129,385.26-178,549.82-72,796.50

Finding the Fourth Proportional to 129,385.26, 178,549.82 and 72,796.50

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Solution

The fourth proportional to 129,385.26, 178,549.82 and 72,796.50 is: 100,458.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,385.26 : 178,549.82 = 72,796.50 : x
  2. Step 2: Convert to fraction form
    129,385.26/178,549.82 = 72,796.50/x
  3. Step 3: Cross multiply
    129,385.26x = 178,549.82 × 72,796.50
  4. Step 4: Simplify right side
    129,385.26x = 12,997,801,971.63
  5. Step 5: Solve for x
    x = 12,997,801,971.63/129,385.26
  6. Step 6: Final answer
    x = 100,458.14

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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.