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Finding the Fourth Proportional to 91,903.40, 137,672.85 and 80,944.10

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Solution

The fourth proportional to 91,903.40, 137,672.85 and 80,944.10 is: 121,255.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,903.40 : 137,672.85 = 80,944.10 : x
  2. Step 2: Convert to fraction form
    91,903.40/137,672.85 = 80,944.10/x
  3. Step 3: Cross multiply
    91,903.40x = 137,672.85 × 80,944.10
  4. Step 4: Simplify right side
    91,903.40x = 11,143,804,937.69
  5. Step 5: Solve for x
    x = 11,143,804,937.69/91,903.40
  6. Step 6: Final answer
    x = 121,255.63

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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.