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Finding the Fourth Proportional to 76,912.20, 115,368.30 and 71,007.30

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Solution

The fourth proportional to 76,912.20, 115,368.30 and 71,007.30 is: 106,510.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,912.20 : 115,368.30 = 71,007.30 : x
  2. Step 2: Convert to fraction form
    76,912.20/115,368.30 = 71,007.30/x
  3. Step 3: Cross multiply
    76,912.20x = 115,368.30 × 71,007.30
  4. Step 4: Simplify right side
    76,912.20x = 8,191,991,488.59
  5. Step 5: Solve for x
    x = 8,191,991,488.59/76,912.20
  6. Step 6: Final answer
    x = 106,510.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.