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Finding the Fourth Proportional to 130,380.99, 179,928.32 and 85,087.95

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Solution

The fourth proportional to 130,380.99, 179,928.32 and 85,087.95 is: 117,423.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,380.99 : 179,928.32 = 85,087.95 : x
  2. Step 2: Convert to fraction form
    130,380.99/179,928.32 = 85,087.95/x
  3. Step 3: Cross multiply
    130,380.99x = 179,928.32 × 85,087.95
  4. Step 4: Simplify right side
    130,380.99x = 15,309,731,470.30
  5. Step 5: Solve for x
    x = 15,309,731,470.30/130,380.99
  6. Step 6: Final answer
    x = 117,423.03

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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.