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Finding the Fourth Proportional to 91,009.75, 136,576.09 and 31,845.94

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Solution

The fourth proportional to 91,009.75, 136,576.09 and 31,845.94 is: 47,790.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,009.75 : 136,576.09 = 31,845.94 : x
  2. Step 2: Convert to fraction form
    91,009.75/136,576.09 = 31,845.94/x
  3. Step 3: Cross multiply
    91,009.75x = 136,576.09 × 31,845.94
  4. Step 4: Simplify right side
    91,009.75x = 4,349,393,967.57
  5. Step 5: Solve for x
    x = 4,349,393,967.57/91,009.75
  6. Step 6: Final answer
    x = 47,790.42

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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.