Home / 129,112.66-178,174.08-75,406.02

Finding the Fourth Proportional to 129,112.66, 178,174.08 and 75,406.02

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Solution

The fourth proportional to 129,112.66, 178,174.08 and 75,406.02 is: 104,059.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,112.66 : 178,174.08 = 75,406.02 : x
  2. Step 2: Convert to fraction form
    129,112.66/178,174.08 = 75,406.02/x
  3. Step 3: Cross multiply
    129,112.66x = 178,174.08 × 75,406.02
  4. Step 4: Simplify right side
    129,112.66x = 13,435,398,239.96
  5. Step 5: Solve for x
    x = 13,435,398,239.96/129,112.66
  6. Step 6: Final answer
    x = 104,059.50

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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.