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Finding the Fourth Proportional to 138,640.55, 207,960.83 and 110,100.20

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Solution

The fourth proportional to 138,640.55, 207,960.83 and 110,100.20 is: 165,150.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,640.55 : 207,960.83 = 110,100.20 : x
  2. Step 2: Convert to fraction form
    138,640.55/207,960.83 = 110,100.20/x
  3. Step 3: Cross multiply
    138,640.55x = 207,960.83 × 110,100.20
  4. Step 4: Simplify right side
    138,640.55x = 22,896,528,424.67
  5. Step 5: Solve for x
    x = 22,896,528,424.67/138,640.55
  6. Step 6: Final answer
    x = 165,150.30

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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.