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Finding the Fourth Proportional to 91,165.88, 136,773.93 and 31,993.76

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Solution

The fourth proportional to 91,165.88, 136,773.93 and 31,993.76 is: 47,999.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,165.88 : 136,773.93 = 31,993.76 : x
  2. Step 2: Convert to fraction form
    91,165.88/136,773.93 = 31,993.76/x
  3. Step 3: Cross multiply
    91,165.88x = 136,773.93 × 31,993.76
  4. Step 4: Simplify right side
    91,165.88x = 4,375,912,290.68
  5. Step 5: Solve for x
    x = 4,375,912,290.68/91,165.88
  6. Step 6: Final answer
    x = 47,999.45

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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.