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Finding the Fourth Proportional to 91,104.68, 136,718.46 and 31,940.84

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Solution

The fourth proportional to 91,104.68, 136,718.46 and 31,940.84 is: 47,932.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,104.68 : 136,718.46 = 31,940.84 : x
  2. Step 2: Convert to fraction form
    91,104.68/136,718.46 = 31,940.84/x
  3. Step 3: Cross multiply
    91,104.68x = 136,718.46 × 31,940.84
  4. Step 4: Simplify right side
    91,104.68x = 4,366,902,455.91
  5. Step 5: Solve for x
    x = 4,366,902,455.91/91,104.68
  6. Step 6: Final answer
    x = 47,932.80

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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.