Home / 91,749.20-137,494.20-67,870.40

Finding the Fourth Proportional to 91,749.20, 137,494.20 and 67,870.40

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Solution

The fourth proportional to 91,749.20, 137,494.20 and 67,870.40 is: 101,709.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,749.20 : 137,494.20 = 67,870.40 : x
  2. Step 2: Convert to fraction form
    91,749.20/137,494.20 = 67,870.40/x
  3. Step 3: Cross multiply
    91,749.20x = 137,494.20 × 67,870.40
  4. Step 4: Simplify right side
    91,749.20x = 9,331,786,351.68
  5. Step 5: Solve for x
    x = 9,331,786,351.68/91,749.20
  6. Step 6: Final answer
    x = 101,709.73

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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.