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Finding the Fourth Proportional to 91,231.80, 136,869.04 and 31,260.92

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Solution

The fourth proportional to 91,231.80, 136,869.04 and 31,260.92 is: 46,898.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,231.80 : 136,869.04 = 31,260.92 : x
  2. Step 2: Convert to fraction form
    91,231.80/136,869.04 = 31,260.92/x
  3. Step 3: Cross multiply
    91,231.80x = 136,869.04 × 31,260.92
  4. Step 4: Simplify right side
    91,231.80x = 4,278,652,109.92
  5. Step 5: Solve for x
    x = 4,278,652,109.92/91,231.80
  6. Step 6: Final answer
    x = 46,898.69

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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.