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Finding the Fourth Proportional to 91,936.40, 138,034.20 and 56,944.40

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Solution

The fourth proportional to 91,936.40, 138,034.20 and 56,944.40 is: 85,496.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,936.40 : 138,034.20 = 56,944.40 : x
  2. Step 2: Convert to fraction form
    91,936.40/138,034.20 = 56,944.40/x
  3. Step 3: Cross multiply
    91,936.40x = 138,034.20 × 56,944.40
  4. Step 4: Simplify right side
    91,936.40x = 7,860,274,698.48
  5. Step 5: Solve for x
    x = 7,860,274,698.48/91,936.40
  6. Step 6: Final answer
    x = 85,496.87

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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.