Home / 129,270.56-178,391-71,909.60

Finding the Fourth Proportional to 129,270.56, 178,391 and 71,909.60

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Solution

The fourth proportional to 129,270.56, 178,391 and 71,909.60 is: 99,233.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,270.56 : 178,391 = 71,909.60 : x
  2. Step 2: Convert to fraction form
    129,270.56/178,391 = 71,909.60/x
  3. Step 3: Cross multiply
    129,270.56x = 178,391 × 71,909.60
  4. Step 4: Simplify right side
    129,270.56x = 12,828,025,453.60
  5. Step 5: Solve for x
    x = 12,828,025,453.60/129,270.56
  6. Step 6: Final answer
    x = 99,233.93

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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.