Home / 91,806.20-137,790.30-54,319.40

Finding the Fourth Proportional to 91,806.20, 137,790.30 and 54,319.40

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Solution

The fourth proportional to 91,806.20, 137,790.30 and 54,319.40 is: 81,527.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,806.20 : 137,790.30 = 54,319.40 : x
  2. Step 2: Convert to fraction form
    91,806.20/137,790.30 = 54,319.40/x
  3. Step 3: Cross multiply
    91,806.20x = 137,790.30 × 54,319.40
  4. Step 4: Simplify right side
    91,806.20x = 7,484,686,421.82
  5. Step 5: Solve for x
    x = 7,484,686,421.82/91,806.20
  6. Step 6: Final answer
    x = 81,527.03

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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.