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Finding the Fourth Proportional to 91,785.75, 137,644.98 and 31,798.73

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Solution

The fourth proportional to 91,785.75, 137,644.98 and 31,798.73 is: 47,686.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,785.75 : 137,644.98 = 31,798.73 : x
  2. Step 2: Convert to fraction form
    91,785.75/137,644.98 = 31,798.73/x
  3. Step 3: Cross multiply
    91,785.75x = 137,644.98 × 31,798.73
  4. Step 4: Simplify right side
    91,785.75x = 4,376,935,494.27
  5. Step 5: Solve for x
    x = 4,376,935,494.27/91,785.75
  6. Step 6: Final answer
    x = 47,686.44

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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.