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Finding the Fourth Proportional to 91,903.90, 137,673.60 and 80,944.60

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Solution

The fourth proportional to 91,903.90, 137,673.60 and 80,944.60 is: 121,256.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,903.90 : 137,673.60 = 80,944.60 : x
  2. Step 2: Convert to fraction form
    91,903.90/137,673.60 = 80,944.60/x
  3. Step 3: Cross multiply
    91,903.90x = 137,673.60 × 80,944.60
  4. Step 4: Simplify right side
    91,903.90x = 11,143,934,482.56
  5. Step 5: Solve for x
    x = 11,143,934,482.56/91,903.90
  6. Step 6: Final answer
    x = 121,256.38

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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.