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Finding the Fourth Proportional to 80,246.88, 119,717 and 78,184.80

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Solution

The fourth proportional to 80,246.88, 119,717 and 78,184.80 is: 116,640.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,246.88 : 119,717 = 78,184.80 : x
  2. Step 2: Convert to fraction form
    80,246.88/119,717 = 78,184.80/x
  3. Step 3: Cross multiply
    80,246.88x = 119,717 × 78,184.80
  4. Step 4: Simplify right side
    80,246.88x = 9,360,049,701.60
  5. Step 5: Solve for x
    x = 9,360,049,701.60/80,246.88
  6. Step 6: Final answer
    x = 116,640.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.