Home / 129,111.73-178,146.54-75,372.36

Finding the Fourth Proportional to 129,111.73, 178,146.54 and 75,372.36

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Solution

The fourth proportional to 129,111.73, 178,146.54 and 75,372.36 is: 103,997.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,111.73 : 178,146.54 = 75,372.36 : x
  2. Step 2: Convert to fraction form
    129,111.73/178,146.54 = 75,372.36/x
  3. Step 3: Cross multiply
    129,111.73x = 178,146.54 × 75,372.36
  4. Step 4: Simplify right side
    129,111.73x = 13,427,325,145.63
  5. Step 5: Solve for x
    x = 13,427,325,145.63/129,111.73
  6. Step 6: Final answer
    x = 103,997.72

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1.5x scale

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.