Home / 129,111.23-178,145.86-75,371.85

Finding the Fourth Proportional to 129,111.23, 178,145.86 and 75,371.85

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Solution

The fourth proportional to 129,111.23, 178,145.86 and 75,371.85 is: 103,997.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,111.23 : 178,145.86 = 75,371.85 : x
  2. Step 2: Convert to fraction form
    129,111.23/178,145.86 = 75,371.85/x
  3. Step 3: Cross multiply
    129,111.23x = 178,145.86 × 75,371.85
  4. Step 4: Simplify right side
    129,111.23x = 13,427,183,038.04
  5. Step 5: Solve for x
    x = 13,427,183,038.04/129,111.23
  6. Step 6: Final answer
    x = 103,997.02

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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.