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Finding the Fourth Proportional to 137,391.81, 189,602.67 and 80,029.67

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Solution

The fourth proportional to 137,391.81, 189,602.67 and 80,029.67 is: 110,442.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,391.81 : 189,602.67 = 80,029.67 : x
  2. Step 2: Convert to fraction form
    137,391.81/189,602.67 = 80,029.67/x
  3. Step 3: Cross multiply
    137,391.81x = 189,602.67 × 80,029.67
  4. Step 4: Simplify right side
    137,391.81x = 15,173,838,163.21
  5. Step 5: Solve for x
    x = 15,173,838,163.21/137,391.81
  6. Step 6: Final answer
    x = 110,442.09

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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.