Home / 128,833.40-193,346.10-66,471.80

Finding the Fourth Proportional to 128,833.40, 193,346.10 and 66,471.80

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Solution

The fourth proportional to 128,833.40, 193,346.10 and 66,471.80 is: 99,757.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,833.40 : 193,346.10 = 66,471.80 : x
  2. Step 2: Convert to fraction form
    128,833.40/193,346.10 = 66,471.80/x
  3. Step 3: Cross multiply
    128,833.40x = 193,346.10 × 66,471.80
  4. Step 4: Simplify right side
    128,833.40x = 12,852,063,289.98
  5. Step 5: Solve for x
    x = 12,852,063,289.98/128,833.40
  6. Step 6: Final answer
    x = 99,757.23

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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.