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Finding the Fourth Proportional to 137,358.08, 189,583.44 and 80,801.72

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Solution

The fourth proportional to 137,358.08, 189,583.44 and 80,801.72 is: 111,523.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,358.08 : 189,583.44 = 80,801.72 : x
  2. Step 2: Convert to fraction form
    137,358.08/189,583.44 = 80,801.72/x
  3. Step 3: Cross multiply
    137,358.08x = 189,583.44 × 80,801.72
  4. Step 4: Simplify right side
    137,358.08x = 15,318,668,035.52
  5. Step 5: Solve for x
    x = 15,318,668,035.52/137,358.08
  6. Step 6: Final answer
    x = 111,523.60

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1.5x scale

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.