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Finding the Fourth Proportional to 138,323.70, 207,485.55 and 113,391.90

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Solution

The fourth proportional to 138,323.70, 207,485.55 and 113,391.90 is: 170,087.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,323.70 : 207,485.55 = 113,391.90 : x
  2. Step 2: Convert to fraction form
    138,323.70/207,485.55 = 113,391.90/x
  3. Step 3: Cross multiply
    138,323.70x = 207,485.55 × 113,391.90
  4. Step 4: Simplify right side
    138,323.70x = 23,527,180,737.05
  5. Step 5: Solve for x
    x = 23,527,180,737.05/138,323.70
  6. Step 6: Final answer
    x = 170,087.85

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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.