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Finding the Fourth Proportional to 129,015.92, 178,053.72 and 75,326.96

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Solution

The fourth proportional to 129,015.92, 178,053.72 and 75,326.96 is: 103,958.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,015.92 : 178,053.72 = 75,326.96 : x
  2. Step 2: Convert to fraction form
    129,015.92/178,053.72 = 75,326.96/x
  3. Step 3: Cross multiply
    129,015.92x = 178,053.72 × 75,326.96
  4. Step 4: Simplify right side
    129,015.92x = 13,412,245,444.29
  5. Step 5: Solve for x
    x = 13,412,245,444.29/129,015.92
  6. Step 6: Final answer
    x = 103,958.07

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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.