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Finding the Fourth Proportional to 80,336.01, 119,785.78 and 78,129.03

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Solution

The fourth proportional to 80,336.01, 119,785.78 and 78,129.03 is: 116,495.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,336.01 : 119,785.78 = 78,129.03 : x
  2. Step 2: Convert to fraction form
    80,336.01/119,785.78 = 78,129.03/x
  3. Step 3: Cross multiply
    80,336.01x = 119,785.78 × 78,129.03
  4. Step 4: Simplify right side
    80,336.01x = 9,358,747,346.05
  5. Step 5: Solve for x
    x = 9,358,747,346.05/80,336.01
  6. Step 6: Final answer
    x = 116,495.04

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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.