Home / 129,688.56-179,014.86-75,990.96

Finding the Fourth Proportional to 129,688.56, 179,014.86 and 75,990.96

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Solution

The fourth proportional to 129,688.56, 179,014.86 and 75,990.96 is: 104,893.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,688.56 : 179,014.86 = 75,990.96 : x
  2. Step 2: Convert to fraction form
    129,688.56/179,014.86 = 75,990.96/x
  3. Step 3: Cross multiply
    129,688.56x = 179,014.86 × 75,990.96
  4. Step 4: Simplify right side
    129,688.56x = 13,603,511,065.67
  5. Step 5: Solve for x
    x = 13,603,511,065.67/129,688.56
  6. Step 6: Final answer
    x = 104,893.69

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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.