Home / 128,675.12-193,040.40-39,926.88

Finding the Fourth Proportional to 128,675.12, 193,040.40 and 39,926.88

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Solution

The fourth proportional to 128,675.12, 193,040.40 and 39,926.88 is: 59,898.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,675.12 : 193,040.40 = 39,926.88 : x
  2. Step 2: Convert to fraction form
    128,675.12/193,040.40 = 39,926.88/x
  3. Step 3: Cross multiply
    128,675.12x = 193,040.40 × 39,926.88
  4. Step 4: Simplify right side
    128,675.12x = 7,707,500,885.95
  5. Step 5: Solve for x
    x = 7,707,500,885.95/128,675.12
  6. Step 6: Final answer
    x = 59,898.92

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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.