Home / 128,677.12-193,043.40-39,928.88

Finding the Fourth Proportional to 128,677.12, 193,043.40 and 39,928.88

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Solution

The fourth proportional to 128,677.12, 193,043.40 and 39,928.88 is: 59,901.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,677.12 : 193,043.40 = 39,928.88 : x
  2. Step 2: Convert to fraction form
    128,677.12/193,043.40 = 39,928.88/x
  3. Step 3: Cross multiply
    128,677.12x = 193,043.40 × 39,928.88
  4. Step 4: Simplify right side
    128,677.12x = 7,708,006,753.39
  5. Step 5: Solve for x
    x = 7,708,006,753.39/128,677.12
  6. Step 6: Final answer
    x = 59,901.92

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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.