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Finding the Fourth Proportional to 129,809.84, 179,154 and 75,350.36

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Solution

The fourth proportional to 129,809.84, 179,154 and 75,350.36 is: 103,993.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,809.84 : 179,154 = 75,350.36 : x
  2. Step 2: Convert to fraction form
    129,809.84/179,154 = 75,350.36/x
  3. Step 3: Cross multiply
    129,809.84x = 179,154 × 75,350.36
  4. Step 4: Simplify right side
    129,809.84x = 13,499,317,499.67
  5. Step 5: Solve for x
    x = 13,499,317,499.67/129,809.84
  6. Step 6: Final answer
    x = 103,993.03

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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.