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Finding the Fourth Proportional to 138,608.40, 207,912.60 and 98,950.80

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Solution

The fourth proportional to 138,608.40, 207,912.60 and 98,950.80 is: 148,426.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,608.40 : 207,912.60 = 98,950.80 : x
  2. Step 2: Convert to fraction form
    138,608.40/207,912.60 = 98,950.80/x
  3. Step 3: Cross multiply
    138,608.40x = 207,912.60 × 98,950.80
  4. Step 4: Simplify right side
    138,608.40x = 20,573,118,100.08
  5. Step 5: Solve for x
    x = 20,573,118,100.08/138,608.40
  6. Step 6: Final answer
    x = 148,426.20

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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.